31849-91-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 31849-91-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,8,4 and 9 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 31849-91:
(7*3)+(6*1)+(5*8)+(4*4)+(3*9)+(2*9)+(1*1)=129
129 % 10 = 9
So 31849-91-9 is a valid CAS Registry Number.
31849-91-9Relevant articles and documents
Selenium-Stabilized Carbanions. Synthesis of Enals and Silyl Enones Using 1,3-Bis(phenylseleno)propene
Reich, Hans J.,Clark, Mark C.,Willis, W.W.
, p. 1618 - 1623 (2007/10/02)
The utility of 1,3-bis(phenylseleno)propene (4) as a propenone synthon having n3 (1) or n1 and n3 (3) reactivity has been examined.Deprotonation of 4 with lithium diisopropylamine in THF at -78 deg C proceeds to give a lit