51157-81-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 51157-81-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,1,1,5 and 7 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 51157-81:
(7*5)+(6*1)+(5*1)+(4*5)+(3*7)+(2*8)+(1*1)=104
104 % 10 = 4
So 51157-81-4 is a valid CAS Registry Number.
51157-81-4Relevant articles and documents
STEREOSELECTIVE ADDITION OF α-CHLORO ALLYLIC CHROMIUM REAGENTS TO ALDEHYDES
Takai, Kazuhiko,Kataoka, Yasutaka,Utimoto, Kiitiro
, p. 4389 - 4392 (2007/10/02)
Treatment of a solution of 1,1-dichloro-2-butene and benzaldehyde with CrCl2 in THF-DMF at 25 deg C for 1 h gave threo-(Z)-4-chloro-2-methyl-1-phenyl-3-buten-1-ol in 96percent yield under high stereocontrol.