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87336-57-0

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87336-57-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 87336-57-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,7,3,3 and 6 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 87336-57:
(7*8)+(6*7)+(5*3)+(4*3)+(3*6)+(2*5)+(1*7)=160
160 % 10 = 0
So 87336-57-0 is a valid CAS Registry Number.

87336-57-0Downstream Products

87336-57-0Relevant articles and documents

Stereoselective Aldol Reaction with Chiral Secondary Acetamides

Devant, Ralf,Braun, Manfred

, p. 2191 - 2207 (2007/10/02)

The deprotonated acetamides 4a - c and 5a - c are added to prochiral carbonyl compounds.The influence of the solvent, of the reaction temperature, and of the enolate gegenion on the ratio of the isomeric products 8/9, 18/19, and 26/27, respectively, are studied.The highest degree of diastereoselectivity are observed, when the titanium enolate of the acetamide 4a or the threefold deprotonated N-acetyl-α-phenylglycinol (5a) is used.The diastereomers 18a - d, formed in excess in the addition of 5a to aldehydes, are isolated in pure from by a single recrystallization, and afford the enantiomerically pure β-hydroxy carboxylic acids 3a - d.Thereby, the chiral auxiliary, α-phenylglycinol (14), is recovered.

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