74137-32-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 74137-32-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,1,3 and 7 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 74137-32:
(7*7)+(6*4)+(5*1)+(4*3)+(3*7)+(2*3)+(1*2)=119
119 % 10 = 9
So 74137-32-9 is a valid CAS Registry Number.
74137-32-9Relevant articles and documents
SILICON IN SYNTHESIS: USE OF THE HIGHLY NUCLEOPHILIC TRIMETHYLSILYLALLYL ANION FOR THE SYNTHESIS OF STEROIDAL 17-SPIRO-γ-LACTONES
Ehlinger, Ed,Magnus, Philip
, p. 11 - 14 (1980)
Trimethylsilylallylzinc chloride 2 (M = ZnCl) reacts with 17-ketosteroids to give adducts 4 that can be converted into 17-spirolactones.