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90173-08-3

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90173-08-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 90173-08-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,1,7 and 3 respectively; the second part has 2 digits, 0 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 90173-08:
(7*9)+(6*0)+(5*1)+(4*7)+(3*3)+(2*0)+(1*8)=113
113 % 10 = 3
So 90173-08-3 is a valid CAS Registry Number.

90173-08-3Relevant articles and documents

C2-symmetric cyclic selenium-catalyzed enantioselective bromoaminocyclization

Chen, Feng,Tan, Chong Kiat,Yeung, Ying-Yeung

supporting information, p. 1232 - 1235 (2013/03/28)

A catalytic asymmetric bromocyclization of trisubstituted olefinic amides that uses a C2-symmetric mannitol-derived cyclic selenium catalyst and a stoichiometric amount of N-bromophthalimide is reported. The resulting enantioenriched pyrrolidine products, which contain two stereogenic centers, can undergo rearrangement to yield 2,3-disubstituted piperidines with excellent diastereoselectivity and enantiospecificity.

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