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195305-62-5

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195305-62-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 195305-62-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,5,3,0 and 5 respectively; the second part has 2 digits, 6 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 195305-62:
(8*1)+(7*9)+(6*5)+(5*3)+(4*0)+(3*5)+(2*6)+(1*2)=145
145 % 10 = 5
So 195305-62-5 is a valid CAS Registry Number.

195305-62-5Upstream product

195305-62-5Relevant articles and documents

Isomerization of Trimethyl α-Keto Trithioorthocarboxylates into α,α-Bis(methylthio) Thiolcarboxylates. A New Rearrangement of Synthetic Interest

Degani, Iacopo,Dughera, Stefano,Fochi, Rita,Gazzetto, Sonia

, p. 7228 - 7233 (1997)

A study was made of the isomerization reaction of a great variety of trimethyl α-keto trithioorthocarboxylates to α,α-bis(methylthio) thiolcarboxylates, intermediates of high synthetic value for the synthesis of α-arylpropionic acids. The reaction was carried out in methylene chloride in the presence of catalytic amounts of trityl perchlorate or methanesulfonic acid and was complete in 2 h at rt. In most of the investigated cases the result was positive, the yields usually being greater than 90%. Also the reaction mechanism was subjected to an experimental study.

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