3440-29-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 3440-29-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,4,4 and 0 respectively; the second part has 2 digits, 2 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 3440-29:
(6*3)+(5*4)+(4*4)+(3*0)+(2*2)+(1*9)=67
67 % 10 = 7
So 3440-29-7 is a valid CAS Registry Number.
3440-29-7Relevant articles and documents
Dithio and thiono esters, LVII: Synthesis of dithio and thiono esters of N-protected β- and γ-amino acids
Brutsche,Hartke
, p. 271 - 276 (1993)
The N-protected β-aminonitriles 1 were transformed into the imidoester or thiolimidoester hydrochlorides 2 or 3 according to Pinner and sulfhydrolyzed with H2S to give the N-protected β-amino thiono esters 4 or dithio esters 5. Alkylation of th
