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81055-91-6

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81055-91-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81055-91-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,0,5 and 5 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 81055-91:
(7*8)+(6*1)+(5*0)+(4*5)+(3*5)+(2*9)+(1*1)=116
116 % 10 = 6
So 81055-91-6 is a valid CAS Registry Number.

81055-91-6Relevant articles and documents

Enantioselective synthesis of fused heterocycles with contiguous stereogenic centers by chiral phosphoric acid catalyzed symmetry breaking

Mori, Keiji,Miyake, Ayaka,Akiyama, Takahiko

supporting information, p. 16107 - 16110 (2015/11/10)

Described herein is a highly enantioselective synthesis of fused piperidine and pyrrolidine derivatives with all-carbon stereogenic centers. The enantioselective reductive amination from Cs-symmetric 1,3-dione derivatives proceeded in a highly stereoselective manner by taking advantage of the desymmetrization approach to afford fused heterocycles with contiguous stereogenic centers in good to excellent enantioselectivities (up to 98% ee).

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