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571-03-9

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571-03-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 571-03-9 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 5,7 and 1 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 571-03:
(5*5)+(4*7)+(3*1)+(2*0)+(1*3)=59
59 % 10 = 9
So 571-03-9 is a valid CAS Registry Number.

571-03-9Downstream Products

571-03-9Relevant articles and documents

Reduction of steroidal ketones with amine - Boranes

Leontjev,Vasiljeva,Pivnitsky

, p. 703 - 708 (2004)

Complexes of secondary amines with borane, R2NH·BH 3, surpass sodium borohydride as reducing agents for saturated and unsaturated steroidal 3-, 12-, 17-, and 20-ketones as regards chemo- and regioselectivity and mildness of the reaction conditions. In the case of 12-ketones, stereoselectivity is also improved.

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