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1254331-99-1

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1254331-99-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1254331-99-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,4,3,3 and 1 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1254331-99:
(9*1)+(8*2)+(7*5)+(6*4)+(5*3)+(4*3)+(3*1)+(2*9)+(1*9)=141
141 % 10 = 1
So 1254331-99-1 is a valid CAS Registry Number.

1254331-99-1Relevant articles and documents

Horner-wadsworth-emmons reagents as azomethine ylide analogues: Pyrrole synthesis via (3 + 2) cycloaddition

Morin, Marie S. T.,St-Cyr, Daniel J.,Arndtsen, Bruce A.

scheme or table, p. 4916 - 4919 (2010/12/25)

Amido-substituted Horner-Wadsworth-Emmons reagents can serve as precursors to 1,3-dipoles for use in cycloaddition. These compounds are assembled in one pot via the TMSOTf-catalyzed Arbuzov reaction of imines, acid chlorides, and phosphites. The coupling of this synthesis with alkyne cycloaddition provides a three-component synthesis of pyrroles. The dipoles can be prepared with a diverse range of imines and acid chlorides, and (3 + 2) cycloaddition with unsymmetrical alkynes is highly regiospecific, providing a modular approach to form substituted pyrroles.

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