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(s)-2-aminobutyric Acid Methyl Ester
CAS No.: 15399-22-1

PATENT

http://www.google.im/patents/WO2003014080A2?cl=en

(S)-amino butyric acid

Step 1 – Synthesis of methyl (S)-aminobutyrate hydrochloride

……………………………(23) …………………………………………………….(24)

5.0g of (S)-amino butyric acid (23) was suspended in 50 ml of methanol and stirred at 0-5°C. 6.35g of thionyl chloride was added dropwise over 45 min to form a clear solution. After stirring for 20 hours at room temperature, the reaction was concentrated under reduced pressure to dryness and the almost colourless residue solidified to give the required product which was dried in an oven at 50°C under vacuum (7.6g; 102% crude yield). The same reaction was scaled-up from 200g of the amino acid and provided 296g (99.5% yield) of product (24). Analysis gave the following results:

1H NMR (DMSO-de) : d 0.94 (3H, t) 1.88 (2H, q) 3.75 (3H, s) 3,9 (1H, m) 8,8

(3H, m). m.p. : 107°C-110°C IR : 2876 cm ¹, 1742 cm ¹.

TLC : Si0₂, 20%MeOH/80%EtOAc/ l%NH OH, UV & IR. (TLC is an abbreviation for thin layer chromatography).

1H NMR PREDICT

(S)-2-aminobutyric acid methyl ester NMR spectra analysis, Chemical CAS NO. 15399-22-1 NMR spectral analysis, (S)-2-aminobutyric acid methyl ester H-NMR spectrum

13C PREDICT

(S)-2-aminobutyric acid methyl ester NMR spectra analysis, Chemical CAS NO. 15399-22-1 NMR spectral analysis, (S)-2-aminobutyric acid methyl ester C-NMR spectrum

P.S. : The views expressed are my personal and in no-way suggest the views of the professional body or the company that I represent.

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MANUDEVI

(S)-2-amino-butanamide hydrochloride………. Key intermediate of Levetiracetam

April 5, 2015 6:22 am / Leave a comment

(S)-2-amino-butanamide hydrochloride………. Key intermediate of Levetiracetam

(S)-2-amino-butanamide hydrochloride

Key intermediate of Levetiracetam

CAS Number 7682-20-4

Linear Formula CH₃CH₂CH(NH₂)CONH₂ · HCl

Stage B

(S)-2-aminobutyramide hydrochloride Preparation

Into the above (S)-2-aminobutyric acid methyl ester hydrochloride is added Isopropanol is then added, followed by the introduction of ammonia gas at a pressure about 60 psi (413 kPa) until the reaction is complete. After filtering to remove formed ammonium chloride, the solvent is partially evaporated and isopropanol hydrochloride is added. The mixture is stirred while solid product forms, then the solid is separated by filtration and washed with isopropanol.

The product was characterized by the following ¹H NMR data (200 MHz, DMSO-d₆): 0.9-1.0(t,3H), 1.8-1.9(Q,2H), 3.7-3.8(t, 1H), 7.5-7.7(Br,NH₂), 8.0-8.2(Br,NH₂)

1H NMR PREDICT

………..

13C NMR PREDICT

(2S)-2-aminobutanamide,hydrochloride NMR spectra analysis, Chemical CAS NO. 7682-20-4 NMR spectral analysis, (2S)-2-aminobutanamide,hydrochloride C-NMR spectrum

P.S. : The views expressed are my personal and in no-way suggest the views of the professional body or the company that I represent.

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TIRUPATI, INDIA
Map of tirupati town .

Tirupati తిరుపతి
City
Clockwise from top: Tirumala Venkateswara Temple, Tirumala ghat road, City skyline and Chandragiri fort
Tirupati Location in Andhra Pradesh, India
Coordinates: 13.65°N 79.42°ECoordinates: 13.65°N 79.42°E
Country	India
State	Andhra Pradesh
Region	Rayalaseema
District	Chittoor
Government
• Member of Parliament	Varaprasad Rao Velagapalli
Area
• City	24 km² (9 sq mi)
Elevation	161 m (528 ft)
Population (2011)^[1]
• City	287,035
• Density	12,000/km² (31,000/sq mi)
• Metro^[2]	459,985
Languages
• Official	Telugu
Time zone	IST (UTC+5:30)
PIN	517501
Telephone code	+91–877
Vehicle registration	AP 03
Website	Tirupati Mucnicipal Corporation

.
Kapila Theertham in Tirupati

Food Service During Tirumala Tirupati Devastanam’s ‘Srinivasa Kalyanam Utsavam’ at MARG Swarnabhoomi

(2S)-2- Oxopyrrolidin-1-yl)butanoic acid………….Key Levetiracetam intermediate

April 5, 2015 6:18 am / Leave a comment

(2S)-2- Oxopyrrolidin-1-yl)butanoic acid………….Key Levetiracetam intermediate

(s)-2-(2-oxopyrrolidin-1-yl)butanoic Acid
CAS No.:	102849-49-0
Synonyms:	(2S)-2-(2-Oxopyrrolidin-1-yl)butanoic acid;
Formula:	C8H13NO3
Exact Mass:	171.09000

1H NMR PREDICT

1H NMR (CDCl3, 400 MHz): δ 0.93 (t, J = 7.7 Hz, 3H), 1.67–1.76 (m, 1H), 1.99–2.13 (m, 3H), 2.49 (t, J = 7.7 Hz, 2H), 3.37 (m, J = 8.7, 5.8 Hz, 1H), 3.52-3.58 (m, 1H), 4.64 (dd, J = 10.6, 4.8 Hz, 1H);
Journal of Chemical and Pharmaceutical Research, 2012, 4(12):4988-4994

(S)-2-(2-Oxopyrrolidin-1-yl)butanoic acid NMR spectra analysis, Chemical CAS NO. 102849-49-0 NMR spectral analysis, (S)-2-(2-Oxopyrrolidin-1-yl)butanoic acid H-NMR spectrum

13 C NMR PREDICT

13C NMR (CDCl3, 125 MHz) : δ 10.8, 18.2, 21.9, 30.8, 43.9, 55.4, 173.7, 177.2;
Journal of Chemical and Pharmaceutical Research, 2012, 4(12):4988-4994

Cosy predict.BELOW

SYNTHESIS AS IN PAPER

Asymmetric synthesis of chiral amines by highly diastereoselective 1,2-additions of organometallic reagents to N-tert-Butanesulfinyl Imines

Chandra Babu K1,2*, Buchi Reddy R3 , Mukkanti K2 , Madhusudhan G1 and Srinivasulu P1
1 Inogent Laboratories (A GVK BIO Company), 28A, IDA, Nacharam, Hyderabad 500 076, India 2Centre for Pharmaceutical Sciences, JNT University, Kukatpally, Hyderabad 500 072, India
3Orchid Chemicals & Pharmaceuticals Ltd, 476/14, R&D Centre, Chennai -600 119, India __________________________________________________________________________
http://jocpr.com/vol4-iss12-2012/JCPR-2012-4-12-4988-4994.pdf

ABSTRACT We report an asymmetric synthesis of chiral amines (4S,5S)-Cytoxazone, Taxol side chain moiety and (S)- Levetiracetam starting from versatile new chiral N- sulfinimine (4). The key step, stereoselective 1,2-addition of Grignard reagent to chiral N-sulfinimine derived from (R)-glyceraldehyde acetonide and (S)-t-BSA gave the corresponding sulfonamide in high diastereoselectivity. Subsequent reactions yielded the targeted biological active and pharmaceutical important compounds with high purity (>99%) and yield

Journal of Chemical and Pharmaceutical Research, 2012, 4(12):4988-4994

(S)-2-(2-oxopyrrolidin-1-yl)butanoic acid, 16 Potassium hydroxide (1.0 g, 0.017 mol)) was dissolved into water (18.0 ml). Tetra-n-butyl ammonium bromide (0.2 g, 0.0062 mol)) and (S)-15 (1.0 g, 0.0063 mol)) in methylene chloride (10 ml) were charged in 30 min. charged Potassium permanganate (1.5 g, 0.094 mol)). After completion of reaction filtered through a celite bed and washed with water (10.0 ml). The aqueous layer pH was adjusted to 3 using hydrochloric acid (2 ml). Added sodium phosphate (2.5 g, 0.0152 mol) and toluene (25.0 ml). The reaction mixture extracted with dichloromethane (5 x 25 ml). The organic solution was dried with (Na2SO4) distilled under vacuo to give compound 16 as oil. To the residue toluene (10 ml) was added and stirred at 0 °C for about 30 min. The solid was filtered and washed with toluene (5 ml) afford the pure compound 16 (0.83g, 76%);

Mp: 124–125 °C; [α] 25 D = – 24.3 (c l.0, acetone);

13C NMR (CDCl3, 125 MHz) : δ 10.8, 18.2, 21.9, 30.8, 43.9, 55.4, 173.7, 177.2;

IR (CHCl3) ν max : 2975, 1731, 1620 cm–1; ESI-MS: m/z 170.0 [M- +1].

Orchid Chemicals & Pharmaceuticals Ltd

Centre for Pharmaceutical Sciences, JNT University

Inogent Laboratories (A GVK BIO Company)

P.S. : The views expressed are my personal and in no-way suggest the views of the professional body or the company that I represent.

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Simple and effective method for two-step synthesis of 2-(1,3-dithian-2-ylidene)-acetonitrile

March 31, 2015 4:45 am / Leave a comment

Simple and effective method for two-step synthesis of 2-(1,3-dithian-2-ylidene)-acetonitrile (75% overall yield) and molecular modeling calculation of the mechanism by B3LYP and the 6-311++G(2df,2p) basis set.

http://dx.doi.org/10.5935/0100-4042.20140308

Publicado online: dezembro 12, 2014

Método alternativo para a síntese e mecanismo de 2-(1,3-ditiano-2-ilideno)-acetonitrila

Marcelle S. Ferreira; José D. Figueroa-Villar^*

Quim. Nova, Vol. 38, No. 2, 233-236, 2015

Artigo http://dx.doi.org/10.5935/0100-4042.20140308

*e-mail: jdfv2009@gmail.com

MÉTODO ALTERNATIVO PARA A SÍNTESE E MECANISMO DE 2-(1,3-DITIANO-2-ILIDENO)-ACETONITRILA

Marcelle S. Ferreira e José D. Figueroa-Villar* Departamento de Química, Instituto Militar de Engenharia, Praça General Tiburcio 80, 22290-270

Rio de Janeiro – RJ, Brasil

Recebido em 18/08/2014; aceito em 15/10/2014; publicado na web em 12/12/2014

ALTERNATIVE METHOD FOR SYNTHESIS AND MECHANISM OF 2-(1,3-DITHIAN-2-YLIDENE)-ACETONITRILE. We report an alternative method for the synthesis of 2-(1,3-dithian-2-ylidene)-acetonitrile using 3-(4-chlorophenyl)-3-oxopropanenitrile and carbon disulfide as starting materials. The methanolysis of the intermediate 3-(4-chlorophenyl)-2-(1,3-dithian-2-ylidene)-3- oxopropanenitrile occurs via three possible intermediates, leading to the formation of the product at a 75% overall yield. Molecular modeling simulation of the reaction pathway using B3LYP 6-311G++(2df,2p) justified the proposed reaction mechanism. Keywords: 2-(1,3-dithian-2-ylidene)-acetonitrile; reaction mechanism; methanolysis; molecular modeling.

3-(4-clorofenil)-2-(1,3-ditiano-2-ilideno)-3-oxopropanonitrila (3): Cristal amarelo. Rendimento: 95%, 2,80 g, pf 158-160 °C, lit.21 159-160 °C;

IV (KBr, cm-1): 2198 (CN), 1612 (C=O), 1585, 1560 (aromático), 678 cm -1 (C-S);

1H RMN (300 MHz, CDCl3) δ 2,38 (m, J 6,9, 2H, CH2); 3,01 (t, J 6,6, 2H, SCH2); 3,17 (t, J 7,2 , 2H, SCH2); 7,43 (d, J 8,5, 2H); 7,83 (d, J 8,5, 2H);

13C RMN (75 MHz, CDCl3) δ 23,9 (CH2), 30,4 (SCH2), 104,2 (CCO), 117,5 (CN), 128,9, 130,5, 135,6, 139,2 (aromático), 185,2 (C=CS), 185,4 (CO).

21…….Rudorf, W. D.; Augustin, M.; Phosphorus Sulfur Relat. Elem. 1981, 9, 329.

…………………………………….

Síntese da 2-(1,3-ditiano-2-ilideno)-acetonitrila (1) Em um balão de fundo redondo de 100 mL foram adicionados 0,400 g (1,4 mmol) de 3-(4-clorofenil)-2-(1,3-ditiano-2-ilideno)-3- -oxopropanonitrila (2) dissolvidos em 15 mL de THF seco, 0,140 g (20 mmol) de sódio e 15 mL de metanol seco sob atmosfera de nitrogênio. A mistura reacional foi mantida sob agitação à 25 °C por 48 h. Em seguida, a mistura reacional foi dissolvida em 30 mL de água destilada e extraída com acetato de etila (3 x 20 mL). A fase orgânica foi seca em sulfato de sódio anidro, filtrada e concentrada a vácuo para se obter o produto bruto, que foi purificado por cromatografia em coluna (silica gel e hexano:acetato de etila 7:3).

2-(1,3-ditiano-2-ilideno)-acetonitrila (1): Cristal branco. Rendimento: 75%, 165 mg, pf. 60-63 °C, lit1 60-62 °C;

1 H RMN (300 MHz, CDCl3) δ 2,23 (m, J 6,8, 2H, CH2); 3,01 (t, J 7,5, 2H, SCH2); 3,06 (t, J 6,9, 2H, SCH2), 5,39 (s, 1H, CH);

13C RMN (75 MHz, CDCl3) δ 22,9 (CH2), 28,7 (SCH2), 28,8 (SCH2), 90,4 (CHCN), 116,3 (CN), 163,8 (C=CS).

1………Yin, Y.; Zangh, Q.; Liu, Q.; Liu, Y.; Sun, S.; Synth. Commun. 2007, 37, 703.

Acetonitrile, 1,3-dithian-2-ylidene-

CAS 113998-04-2

C₆ H₇ N S₂
Acetonitrile, 2-(1,3-dithian-2-ylidene)-
157.26

Melting Point

60-62 °C

Creemer, Lawrence C.; Synthetic Communications 1988, V18(10), P1103-10
Yin, Yanbing; Synthetic Communications 2007, V37(5), P703-711

1H NMR predict

2-(1,3-dithian-2-ylidene)-acetonitrile

ACTUAL 1H NMR VALUES

1 H RMN (300 MHz, CDCl3)

δ 2,23 (m, J 6,8, 2H, CH2);

3,01 (t, J 7,5, 2H, SCH2);

3,06 (t, J 6,9, 2H, SCH2),

5,39 (s, 1H, CH);

……………………..

13C NMR PREDICT

ACTUAL 13C NMR VALUE

13C RMN (75 MHz, CDCl3)

δ 22,9 (CH2),

28,7 (SCH2),

28,8 (SCH2),

90,4 (CHCN),

116,3 (CN),

163,8 (C=CS)

COSY NMR PREDICT

SYNTHESIS

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2-(1,3-ditiano-2-ilideno)-acetonitrila (1): Cristal branco. Rendimento: 75%, 165 mg, pf. 60-63 °C, lit1 60-62 °C;

1 H RMN (300 MHz, CDCl3) δ 2,23 (m, J 6,8, 2H, CH2); 3,01 (t, J 7,5, 2H, SCH2); 3,06 (t, J 6,9, 2H, SCH2), 5,39 (s, 1H, CH);

13C RMN (75 MHz, CDCl3) δ 22,9 (CH2), 28,7 (SCH2), 28,8 (SCH2), 90,4 (CHCN), 116,3 (CN), 163,8 (C=CS).

WILL BE UPDATED WATCH OUT…………………

Departamento de Química, Instituto Militar de Engenharia, Praça General Tiburcio

Instituto Militar de Engenharia, Rio de Janeiro. BELOW

Entrada do antigo Instituto de Química da UFRGS, um prédio histórico

Equipe – Os módulos foram fabricados na Unisanta sob a supervisão do professor Luiz Renato Lia, coordenador do Curso de Engenharia Química, …

Instituto de Florestas da Universidade Federal Rural do Rio de Janeiro

Praça General Tibúrcio

Praça General Tibúrcio com o Morro da Urca ao fundo

P.S. : The views expressed are my personal and in no-way suggest the views of the professional body or the company that I represent.

ORGANIC SPECTROSCOPY INTERNATIONAL……A blog to brush up spectroscopy fundamentals

December 7, 2014 4:08 am / 1 Comment on ORGANIC SPECTROSCOPY INTERNATIONAL……A blog to brush up spectroscopy fundamentals

ORGANIC SPECTROSCOPY INTERNATIONAL…………A blog to brush up

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Your Aunt can teach you Organic Opectroscopy

August 2, 2014 3:10 am / Leave a comment

Organic spectroscopy should be brushed up and you get confidence

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Oleanolic acid spectral data and interpretation

http://orgspectroscopyint.blogspot.in/2014/08/oleanolic-acid-spectral-data-and.html

Oleanolic acid
(4aS,6aR,6aS,6bR,8aR,10S,12aR,14bS)-10-hydroxy-2,2,6a,6b,9,9,12a-heptamethyl-1,3,4,5,6,6a,7,8,8a,10,11,12,13,14b-tetradecahydropicene-4a-carboxylic acid

Oleanic acid, Caryophyllin, Astrantiagenin C, Giganteumgenin C, Virgaureagenin B, 3beta-Hydroxyolean-12-en-28-oic acid, OLEANOLIC_ACID

Molecular Formula: C₃₀H₄₈O₃

Molecular Weight: 456.70032

http://orgspectroscopyint.blogspot.in/2014/08/oleanolic-acid-spectral-data-and.html

Ursolic acid [(3b)-3-Hydroxyurs-12-en-28-oic acid] rarely occurs without its isomer oleanolic acid [(3b)-3-Hydroxyolean-12-en-28-oic acid] They may occur in their free acid form, as shown in Figure 1, or as aglycones for triterpenoid saponins which are comprised of a triterpenoid aglycone linked to one or more sugar moieties. Ursolic and oleanolic acids are similar in pharmacological activity

A pentacyclic triterpene that occurs widely in many PLANTS as the free acid or the aglycone for many SAPONINS. It is biosynthesized from lupane. It can rearrange to the isomer, ursolic acid, or be oxidized to taraxasterol and amyrin.

MS
EIMS m/z (rel. int.) 456 [M]+ (5), 412 (3), 248 (100), 203 (50), 167 (25), 44 (51)

IR KBR
(KBr) 3500, 2950, 2850, 1715; 1H-NMR (250 MHz, pyridine-d5) δ: 5.49 (1H, s, H-12), 3.47 (1H, t, J = 8.0 Hz, H-3), 3.30 (1H, m, H-18), 1.12 (3H, s, CH3-27), 0.96 (3H, s, CH3-30), 0.91 (3H, s, CH3-25), 0.89 (3H, s, CH3-23), 0.87 (3H, s, CH3-24), 0.75 (3H, s, CH3-26)

http://orgspectroscopyint.blogspot.in/2014/08/oleanolic-acid-spectral-data-and.html

1H NMR

(250 MHz, pyridine-d5)δ: 5.49 (1H, s, H-12), 3.47 (1H, t, J = 8.0 Hz, H-3), 3.30 (1H, m, H-18), 1.12 (3H, s, CH3-27), 0.96 (3H, s, CH3-30), 0.91 (3H, s, CH3-25), 0.89 (3H, s, CH3-23), 0.87 (3H, s, CH3-24), 0.75 (3H, s, CH3-26)

13 C NMR

(63 MHz, pyridine-d5) δ: 180.2 (C-28), 144.8 (C-13), 122.5 (C-12), 78.0 (C-3), 55.7 (C-5), 48.0 (C-9), 46.6 (C-8, 17), 42.1 (C-14), 39.7 (C-4), 39.4 (C-1), 37.3 (C-10), 33.2 (C-7), 32.9 (C-29), 32.4 (C-21), 30.9 (C-20), 28.7 (C-23), 27.2 (C-2), 26.9 (C-15), 26.1 (C-30), 23.7 (C-11), 23.6 (C-16), 18.7 (C-6), 17.4 (C-26), 16.5 (C-24), 15.5 (C-25)

http://orgspectroscopyint.blogspot.in/2014/08/oleanolic-acid-spectral-data-and.html

http://www.google.com/patents/US20120237629

FIG. 4 shows the ¹H NMR spectrum of oleanolic acid;

FIG. 5 shows the ¹³C NMR spectrum of oleanolic acid;

FIG. 6 shows the ¹³C DEPT NMR spectrum of oleanolic acid;

FIG. 7 shows the ¹H ¹³C HSQC NMR spectrum of oleanolic acid;

see below

http://orgspectroscopyint.blogspot.in/2014/08/oleanolic-acid-spectral-data-and.html

EXAMPLE 2 Extraction and Isolation of Oleanolic Acid (9) and Maslinic Acid (10) from Cloves

Syzygium aromaticum dried buds or whole cloves were obtained commercially. The cloves (1.5 kg, whole) of Syzygium aromaticum were sequentially and exhaustively extracted with hexane and ethyl acetate to give, after solvent removal in vacuo, a hexane extract (68.8 g, 4.9%) and an ethyl acetate extract (34.1 g, 2.3%). A portion of the ethyl acetate extract (10.0 g), was subjected to chromatographic separation on silica gel (60-120 mesh) column (40×5.0 cm). Elution with hexane/ethyl acetate solvent mixtures (8:2→6:4) afforded pure oleanolic acid (9) (4.7 g, 1.06%), a mixture of oleanolic acid (9) and maslinic acid (10) (0.5 g), and pure maslinic acid (10) (0.25 g). The structures of oleanolic acid (9) and maslinic acid (10) (as 2,3-diacetoxyoleanolic acid) were confirmed by spectroscopic data analysis (1D and 2D ¹H NMR and ¹³C NMR experiments) (FIGS. 4-7 and FIGS. 8-10, respectively).

http://orgspectroscopyint.blogspot.in/2014/08/oleanolic-acid-spectral-data-and.html

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