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139370-99-3

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139370-99-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 139370-99-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,3,7 and 0 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 139370-99:
(8*1)+(7*3)+(6*9)+(5*3)+(4*7)+(3*0)+(2*9)+(1*9)=153
153 % 10 = 3
So 139370-99-3 is a valid CAS Registry Number.

139370-99-3Relevant articles and documents

The Claisen Rearrangement of 2-Phenylsulfinyl-2-propenyl Phenyl Ethers - A New Route to Functionalized Phenols and 2-Methylbenzofurans

Khan, Muhammad Akram

, p. 3682 - 3686 (2007/10/02)

The hitherto unknown Claisen rearrangement of 2-phenylsulfinyl-2-propenyl phenyl ethers to the corresponding 2-(2-phenylsulfinyl-2-propenyl)phenols is reported.The latter compounds underwent Michael reactions with a variety of nucleophiles to provide functionalized phenolic adducts.O-Alkylation of the initial rearrangement products with 3-bromo-2-phenylsulfinyl-1-propene and 2,3-dibromo-1-propene followed by sigmatropic rearrangement provided a promising route to 7-substituted 2-methylbenzofurans.

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