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89321-93-7

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89321-93-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 89321-93-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,9,3,2 and 1 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 89321-93:
(7*8)+(6*9)+(5*3)+(4*2)+(3*1)+(2*9)+(1*3)=157
157 % 10 = 7
So 89321-93-7 is a valid CAS Registry Number.

89321-93-7Downstream Products

89321-93-7Relevant articles and documents

Synthesis of novel 5α,9α-bridged steroids by a boron trifluoride-diethyl ether induced rearrangement

Bondarenko, Lidija,Lorenc, Ljubinka,Bl?ser, Dieter,Boese, Roland

, p. 3526 - 3534 (2007/10/03)

A stereoselective and synthetically useful rearrangement reaction of 5α,8α-bridged 9,11α-epoxy steroids induced by boron trifluoride-diethyl ether is presented, in the preparation of a new class of 5α,9α-bridged 11α-hydroxy steroid derivatives in high yields. Lactones were prepared from several of the rearranged 11α-hydroxy compounds. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004.

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