143137-20-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 143137-20-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,1,3 and 7 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 143137-20:
(8*1)+(7*4)+(6*3)+(5*1)+(4*3)+(3*7)+(2*2)+(1*0)=96
96 % 10 = 6
So 143137-20-6 is a valid CAS Registry Number.
143137-20-6Relevant articles and documents
Synthesis of 21-aryl and heteroaryl ethisterones and the corresponding A-ring substituted [2,3-d]isoxazoles
Kumar,Todaro
, p. 523 - 525 (2007/10/02)
Palladium(0) catalyzed coupling reaction of ethisterone [6; (17α)-17-hydroxypregn-4-en-20-yn-3-one] with aromatic/heteroaromatic halides gave C-21 substituted derivatives 7. Hydroxymethylation of the latter compounds followed by treatment with hydroxylami
