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201226-87-1

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201226-87-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 201226-87-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,1,2,2 and 6 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 201226-87:
(8*2)+(7*0)+(6*1)+(5*2)+(4*2)+(3*6)+(2*8)+(1*7)=81
81 % 10 = 1
So 201226-87-1 is a valid CAS Registry Number.

201226-87-1Relevant articles and documents

Synthesis and application of new chiral bidentate phosphine, 2,7-di-tert-butyl-9,9-dimethyl-4,5-bis (methylphenylphosphino)xanthene

Hamada, Yasumasa,Matsuura, Fumiyoshi,Oku, Makoto,Hatano, Keiichiro,Shioiri, Takayuki

, p. 8961 - 8964 (1997)

New optically active bidentate phosphines, (S,S)- and (R,R)-2,7-di-tert-butyl-9,9-dimethyl-4, 5-bis(methylphenylphosphino)xanthenes ((S,S)-1 and (R,R)-1), were prepared through resolution of the corresponding phosphine oxides using (R, R)-(-)-dibenzoyl-tartaric acid and a preliminary experiment on asymmetric synthesis using an allyl substrate proved the utility of the new bidentate phosphines.

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