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216663-82-0

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216663-82-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 216663-82-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,6,6,6 and 3 respectively; the second part has 2 digits, 8 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 216663-82:
(8*2)+(7*1)+(6*6)+(5*6)+(4*6)+(3*3)+(2*8)+(1*2)=140
140 % 10 = 0
So 216663-82-0 is a valid CAS Registry Number.

216663-82-0Downstream Products

216663-82-0Relevant articles and documents

Optically active C3-symmetric triarylphosphines in asymmetric allylations

Powell, Mark T.,Porte, Alexander M.,Reibenspies, Joe,Burgess, Kevin

, p. 5027 - 5038 (2007/10/03)

A new class of optically active, monodentate, C3-symmetric ligands for asymmetric catalysis, 1-3, were prepared via routes involving asymmetric reduction of aryl ketones (Schemes 1-3). Single crystal X-ray structures of trans-PdCl2(phosphine)2 complexes of ligands 1a, 2a and 3a showed that the ligands do not adopt perfect C3-symmetric conformations in the solid state; in fact, all three have one aromatic ring lying 'face-on' to the metal. Circular dichroism studies of the same complexes provided some evidence for an aromatic ordering effect for complex 22, but none for 21 and 23. Palladium catalyzed allylation reactions using ligands 1-3 showed that encouraging enantioselectivities could be obtained, particularly for cyclic, allylic substrates.

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