Cas 111934-05-5,D-β-carboxyaspartic acid

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Check Digit Verification of cas no

The CAS Registry Mumber 111934-05-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,1,9,3 and 4 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 111934-05:
(8*1)+(7*1)+(6*1)+(5*9)+(4*3)+(3*4)+(2*0)+(1*5)=95
95 % 10 = 5
So 111934-05-5 is a valid CAS Registry Number.

111934-05-5Upstream product

111934-07-7 (3R,5S,6R)-4-<(benzyloxy)carbonyl>-3-(O,O'-dibenzylmalonyl)-5,6-diphenyl-2,3,5,6-tetrahydro-2H-1,4-oxazin-2-one

111934-05-5Downstream Products

112018-26-5 (R)-aspartic acid diethyl ester hydrochloride

111934-05-5Relevant articles and documents

Asymmetric Synthesis of β-Carboxyaspartic Acid

Williams, Robert M.,Sinclair, Peter J.,Zhai, Weixu

, p. 482 - 483 (2007/10/02)

Bromoglycinate 4 was coupled with the (trimethylsilyl)ketene acetal of dibenzyl malonate to furnish predominantly the syn-lactone 6.Hydrogenolysis of 6 directly afforded β carboxyaspartic acid (Asa) in 30percent overall yield in >98percent ee.The optical purity of the synthetic Asa was determined by decarboxylation and esterification to aspartic acid diethyl eester.

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111934-05-5