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177956-76-2

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177956-76-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 177956-76-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,7,9,5 and 6 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 177956-76:
(8*1)+(7*7)+(6*7)+(5*9)+(4*5)+(3*6)+(2*7)+(1*6)=202
202 % 10 = 2
So 177956-76-2 is a valid CAS Registry Number.

177956-76-2Downstream Products

177956-76-2Relevant articles and documents

Stereoselective Synthesis of (cis-Hydrindane) Models for C-18 Radical Reactivity in Steroid C/D Rings

Green, Stuart P.,Whiting, Donald A.

, p. 1753 - 1754 (1992)

The keto-acid 5 undergoes stereospecific Peterson reaction to afford the (Z)-α-unsaturated ester-acid 6, and the derived phenyl selenoester cyclises also stereospecifically to the cis-hydrindanone 8 via a 5-exo acyl radical process; the ketone 8 is transformed through enone 11 into the diene-acids 2 and 3, models for study of C-18 radical reactions in steroid C/D systems.

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