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137570-81-1

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137570-81-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 137570-81-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,5,7 and 0 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 137570-81:
(8*1)+(7*3)+(6*7)+(5*5)+(4*7)+(3*0)+(2*8)+(1*1)=141
141 % 10 = 1
So 137570-81-1 is a valid CAS Registry Number.

137570-81-1Relevant articles and documents

One-Flask, Consecutive and Sigmatropic Rearrangements for Conversions of Propargylic Alcohols into Two-Carbon-Extended 4-Oxo-2-alkenoate Esters. Use of a New 1-Chloro-1-ethoxy-2-sulfinylethylene

Posner, Gary H.,Carry, Jean-Christophe,Crouch, R. David,Johnson, Neil

, p. 6987 - 6993 (2007/10/02)

Seven differently substituted primary and secondary propargylic alcohols are shown to react with (arylsulfinyl)vinylic chloride 1a at 100 deg C for 1 h sequentially via a sigmatropic rearrangement and then a sigmatropic rearrangement to form 4

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