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1033618-36-8

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1033618-36-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1033618-36-8 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,3,3,6,1 and 8 respectively; the second part has 2 digits, 3 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 1033618-36:
(9*1)+(8*0)+(7*3)+(6*3)+(5*6)+(4*1)+(3*8)+(2*3)+(1*6)=118
118 % 10 = 8
So 1033618-36-8 is a valid CAS Registry Number.

1033618-36-8Relevant articles and documents

C2 symmetric chiral NHC ligand for asymmetric quaternary carbon constructing copper-catalyzed conjugate addition of Grignard reagents to 3-substituted cyclohexenones

Matsumoto, Yasumasa,Yamada, Ken-Ichi,Tomioka, Kiyoshi

, p. 4578 - 4581 (2008/09/21)

(Chemical Equation Presented) The asymmetric construction of quaternary carbon centers by conjugate addition of Grignard reagents to 3-methyl- and 3-ethylcyclohexenones was realized in a maximum enantioselectivity of 80% by using a C2 symmetric chiral N-heterocyclic carbene (NHC)-copper catalyst, generated from (4S,5S)-1,3-bis(2-methoxyphenyl)-4,5-diphenyl-4,5- dihydro-1H-imidazol-3-ium tetrafluoroborate and copper(II) triflate. The stereostructures of the NHC-Au complexes were analyzed by X-ray crystallography, which rationalized the good stereocontrolling ability of N-aryl NHCs.

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