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6460-87-3

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6460-87-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 6460-87-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,4,6 and 0 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 6460-87:
(6*6)+(5*4)+(4*6)+(3*0)+(2*8)+(1*7)=103
103 % 10 = 3
So 6460-87-3 is a valid CAS Registry Number.

6460-87-3Relevant articles and documents

General, Robust, and stereocomplementary preparation of α,β-disubstituted α,β-unsaturated esters

Nakatsuji, Hidefumi,Nishikado, Hiroshi,Ueno, Kanako,Tanabe, Yoo

experimental part, p. 4258 - 4261 (2009/12/28)

An (E)- and (Z)-stereocomplementary preparative method for α,β-disubstituted α,β-unsaturated esters Is performed via three general and robust reaction sequences: (i) TI-Claisen condensation (formylation) of esters to give α-formyl esters (12 examples, 60-99%), (II) (E)- and (Z)-stereocomplementary enol ρ-toluenesulfonylation (tosylation) using TsCI-N-methylimidazole (NMI)-Et3N and LiOH (24 examples, 82-99%), and (iii) stereoretentive Suzuki-Miyaura cross-coupling (18 examples, 64-96%).

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