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19728-71-3

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19728-71-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 19728-71-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,7,2 and 8 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 19728-71:
(7*1)+(6*9)+(5*7)+(4*2)+(3*8)+(2*7)+(1*1)=143
143 % 10 = 3
So 19728-71-3 is a valid CAS Registry Number.

19728-71-3SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 20, 2017

Revision Date: Aug 20, 2017

1.Identification

1.1 GHS Product identifier

Product name (S)-2-amino-3-(3,4-dimethoxyphenyl)-2-methylpropanoic acid methyl ester

1.2 Other means of identification

Product number -
Other names α-methyl-β-3,4-dimethoxyphenyl-L-alanine methyl ester

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:19728-71-3 SDS

19728-71-3Relevant articles and documents

Mechanistic Insights into Enantioselective C-H Photooxygenation of Aldehydes via Enamine Catalysis

Walaszek, Dominika J.,Rybicka-Jasińska, Katarzyna,Smoleń, Sabina,Karczewski, Maksymilian,Gryko, Dorota

, p. 2061 - 2070 (2015/06/23)

Organocatalytic photooxygenation of aldehydes at the α-position proceeds via enamine catalysis, though enamines should be easily oxidized by singlet oxygen respectively to amides and carbonyl compounds. Moreover, the formation of a zwitterionic enamine peroxide intermediate was postulated based on experimental and theoretical data. The reaction affords desired diols (after in situ reduction) in a decent yield and (S)- or (R)-enantioselectivity depending on a catalyst used. The (S)-enantiomer predominated in imidazolidinone-catalyzed reactions, while prolineamides assured the formation of the (R)-stereoisomer. DFT calculation suggests that the enamine-oxygen complex with the lowest energy has the E,s-cis conformation for the prolineamide derivative and E,s-trans for the imidazolidinone catalyst, explaining the opposite stereoselectivity in the photooxygenation reaction.

Asymmetrische Synthese von α-Methylaminosaeure-methylestern unter Verwendung von D-Galactodialdehyd als chiralem Hilfsreagens

Hoppe, Inga,Schoellkopf, Ulrich,Toelle, Reinhold

, p. 789 - 791 (2007/10/02)

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