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193071-31-7

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193071-31-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 193071-31-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,3,0,7 and 1 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 193071-31:
(8*1)+(7*9)+(6*3)+(5*0)+(4*7)+(3*1)+(2*3)+(1*1)=127
127 % 10 = 7
So 193071-31-7 is a valid CAS Registry Number.

193071-31-7Relevant articles and documents

Synthesis of enantiomerically pure cyclopentene building blocks

Tietze, Lutz F.,Stadler, Christian,B?hnke, Niels,Brasche, Gordon,Grube, Alexander

, p. 485 - 487 (2007/12/27)

An efficient synthesis of the enantiomerically pure cis-annulated cyclopentenes 2 and ent-2 was established by the use of an enzymatic transesterification and hydrolysis, respectively, followed by an S N2-type substitution with a benzyloxymethyl cuprate and a sigmatropic rearrangement. The advantage of this approach is the short sequence combined with an excellent overall yield and an enantiomeric excess of 99%. Georg Thieme Verlag Stuttgart.

An Enantioselective Epoxide Rearrangement - Claisen Rearrangement Approach to Prostaglandins and (+)-Iridomyrmecin

Hodgson, David M.,Gibbs, Andrew R.

, p. 657 - 658 (2007/10/03)

The asymmetric syntheses of prostaglandin precursor 8 and (+)iridomyrmecin (12) via highly enantioselective rearrangement of the epoxide 1 and subsequent Ireland-Claisen rearrangement are described.

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