157322-61-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 157322-61-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,7,3,2 and 2 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 157322-61:
(8*1)+(7*5)+(6*7)+(5*3)+(4*2)+(3*2)+(2*6)+(1*1)=127
127 % 10 = 7
So 157322-61-7 is a valid CAS Registry Number.
157322-61-7Relevant academic research and scientific papers
Synthetic Studies towards Halichondrins: Synthesis of the C.27-C.38 Segment
Aicher, Thomas D.,Buszek, Keith R.,Fang, Francis G.,Forsyth, Craig J.,Jung, Sun Ho,et al.
, p. 1549 - 1552 (2007/10/02)
An efficient synthesis of the C.27-C.38 segment of halichondrins is accomplished, using the Ireland-Claisen rearrangement, Ni(II)/Cr(II)-mediated coupling and Michael reactions as the key steps.
