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143137-29-5

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143137-29-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 143137-29-5 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 9 respectively.
Calculate Digit Verification of CAS Registry Number 143137-29:
(8*1)+(7*4)+(6*3)+(5*1)+(4*3)+(3*7)+(2*2)+(1*9)=105
105 % 10 = 5
So 143137-29-5 is a valid CAS Registry Number.

143137-29-5Relevant 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

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