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433285-17-7

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433285-17-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 433285-17-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,3,3,2,8 and 5 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 433285-17:
(8*4)+(7*3)+(6*3)+(5*2)+(4*8)+(3*5)+(2*1)+(1*7)=137
137 % 10 = 7
So 433285-17-7 is a valid CAS Registry Number.

433285-17-7Relevant articles and documents

Synthesis of chiral non-racemic 3-(dioxopiperazin-2-yl)propionic acid derivatives

Weigl, Manuela,Wünsch, Bernhard

, p. 1173 - 1183 (2002)

Starting with the proteinogenic amino acid (S)-glutamate (3) a facile, high yielding synthesis of the chiral non-racemic 3-(dioxopiperazin-2-yl)propionates 6, 11, and 14 is presented. Key intermediates in the synthesis of N1-benzyl substituted (dioxopiperazin-2yl)propionates 11 and 14 are the N-monobenzylglutamate 8 and the chloroacetamide 12, which allow introduction of various substituents in position 4 of the piperazine ting. In receptor binding studies with radioligands the 3-(piperazin-2-yl)propanol 15 was found to have promising affinity for σ1-receptors (Ki=66.1 nM).

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