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137540-85-3

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137540-85-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 137540-85-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,5,4 and 0 respectively; the second part has 2 digits, 8 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 137540-85:
(8*1)+(7*3)+(6*7)+(5*5)+(4*4)+(3*0)+(2*8)+(1*5)=133
133 % 10 = 3
So 137540-85-3 is a valid CAS Registry Number.

137540-85-3Downstream Products

137540-85-3Relevant articles and documents

Palladium-Catalyzed Carbonylative Lactonization of Propargyl Alcohols with Organic Dichalcogenides and Carbon Monoxide

Ogawa, Akiya,Kuniyasu, Hitoshi,Sonoda, Noboru,Hirao, Toshikazu

, p. 8361 - 8365 (2007/10/03)

The reaction of propargylic alcohols with diaryl disulfides and carbon monoxide in the presence of tetrakis(triphenylphosphine)palladium leads to a novel thiolative lactonization to afford β-(arylthio)-α,β,-unsaturated lactones in moderate to good yields.

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