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131216-48-3

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131216-48-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 131216-48-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,2,1 and 6 respectively; the second part has 2 digits, 4 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 131216-48:
(8*1)+(7*3)+(6*1)+(5*2)+(4*1)+(3*6)+(2*4)+(1*8)=83
83 % 10 = 3
So 131216-48-3 is a valid CAS Registry Number.

131216-48-3Relevant articles and documents

Triply Convergent, Stereospecific Alkene Formation via Peterson Olefination

Barrett, Anthony G. M.,Flygare, John A.

, p. 638 - 642 (1991)

α-Iodo silanes 8 were prepared from α-hydroxy silanes and after halogen/metal exchange and treatment with copper(I)bromide-dimethyl sulfide were coupled with acid chlorides to yield α-silyl ketones 2.Cram controlled addition with a variety of nucleophiles followed by treatment with acid or base led to either the (E)- or (Z)-alkene in good overall yields from the iodide (47-67percent) and with excellent stereoselectivities (>95/95/5 isomeric purity.

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