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89051-52-5

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89051-52-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 89051-52-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,9,0,5 and 1 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 89051-52:
(7*8)+(6*9)+(5*0)+(4*5)+(3*1)+(2*5)+(1*2)=145
145 % 10 = 5
So 89051-52-5 is a valid CAS Registry Number.

89051-52-5Downstream Products

89051-52-5Relevant articles and documents

A facile halogenative cyclization of 4-(2-benzothioazolyldithio)azetidinones (Kamiya's disulfide) into 2β-(halomethyl)penams in a two layer system

Tanaka,Tanaka,Yamada,Nakai,Ohbayashi,Terada,Torii

, p. 3046 - 3048 (1989)

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THE TRAPPING OF SULFENIC ACIDS FROM PENICILLIN SULFOXIDES. HETEROCYCLIC MERCAPTANS

Micetich, Ronald G.,Maiti, Samarendra N.,Tanaka, Motoaki,Yamazaki, Tomio,Ogawa, Kazuo

, p. 325 - 330 (2007/10/02)

Various heterocyclic thiols have been used for trapping the azetidinone sulfenic acids obtained by the thermolysis of penicillin sulfoxides.The ester function was found to be important in determining the unsym-azetidinone disulfide (α,β- or β,γ-unsaturated) isomer formed.All β,γ-isomers prepared reacted with cupric chloride to give the 2-chloromethylpenams.

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