87109-33-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 87109-33-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,7,1,0 and 9 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 87109-33:
(7*8)+(6*7)+(5*1)+(4*0)+(3*9)+(2*3)+(1*3)=139
139 % 10 = 9
So 87109-33-9 is a valid CAS Registry Number.
87109-33-9Relevant articles and documents
STEREO-CONTROLLED SYNTHESIS OF γ,δ-UNSATURATED KETONES BY THE HORNER-WITTIG REACTION
Cornish, Christopher A.,Warren, Stuart
, p. 2603 - 2606 (2007/10/02)
E and Z isomers of γ,δ-unsaturated ketals may separately be prepared by the Horner-Wittig reaction between 5-diphenyl-phosphinoylpentan-2-one ethylene acetal (6) and aldehydes, esters, or ketones.
