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221907-28-4

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221907-28-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 221907-28-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,9,0 and 7 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 221907-28:
(8*2)+(7*2)+(6*1)+(5*9)+(4*0)+(3*7)+(2*2)+(1*8)=114
114 % 10 = 4
So 221907-28-4 is a valid CAS Registry Number.

221907-28-4Downstream Products

221907-28-4Relevant articles and documents

Synthesis and C-alkylation of C-protected β-enamino acid derivatives from oxa- thia- and imidazolines

Fustero, Santos,Diaz, Ma. Dolores,Asensio, Amparo,Navarro, Antonio,Kong, Jiang She,Aguilar, Enrique

, p. 2695 - 2712 (2007/10/03)

Various heterocycles 3a-h can be readily metallated and condensed with a variety of organic nitriles to afford C-protected β-enamino acid derivatives 1 (or 2). Procedures for alkylation of compounds 1 to obtain 2 as well as a 'one-pot' preparation of 2 from 3 are also described.

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