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173787-23-0

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173787-23-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 173787-23-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,3,7,8 and 7 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 173787-23:
(8*1)+(7*7)+(6*3)+(5*7)+(4*8)+(3*7)+(2*2)+(1*3)=170
170 % 10 = 0
So 173787-23-0 is a valid CAS Registry Number.

173787-23-0Relevant articles and documents

Asymmetric synthesis of SM-9164, a biologically active enantiomer of antifungal agent SM-8668

Miyauchi, Hiroshi,Nakamura, Toshio,Ohashi, Naohito

, p. 2625 - 2632 (2007/10/03)

SM-9164, a biologically active enantiomer of antifungal agent SM-8668, was prepared by asymmetric synthesis in 10 steps in 13% overall yield from commercially available 2-chloro-1-(2,4-difluorophenyl)ethanone. The crucial steps were Katsuki-Sharpless asymmetric epoxidation of the (E)-allylic alcohol and epimerization of the erythro-sulfone to the desired threo-isomer under basic conditions.

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