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66164-74-7

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66164-74-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 66164-74-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,6,1,6 and 4 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 66164-74:
(7*6)+(6*6)+(5*1)+(4*6)+(3*4)+(2*7)+(1*4)=137
137 % 10 = 7
So 66164-74-7 is a valid CAS Registry Number.

66164-74-7Relevant articles and documents

The effects of C-S and C-Se bonds on torquoselectivity: stereoselective olefination of α-thio and α-selenoketones with ynolates

Yoshikawa, Takashi,Mori, Seiji,Shindo, Mitsuru

experimental part, p. 8832 - 8838 (2010/04/06)

Highly Z-selective olefination of acyclic α-thio and α-selenoketones with ynolates has been achieved, and the theoretical calculations of the transition states in the ring-opening of the intermediates, the β-lactone enolates, revealed that the torquoselectivity was controlled by the secondary orbital interactions between the σ orbital of the C-S bond or a lone pair orbital on the S and σ* orbitals of the breaking C-O bond, and the σ orbital of the breaking C-O bond or a lone pair orbital on the O on the ring and the σ* orbitals of the C-S bond. The synthetic applications of the resulting olefins are also shown.

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