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217473-33-1

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217473-33-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 217473-33-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,7,4,7 and 3 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 217473-33:
(8*2)+(7*1)+(6*7)+(5*4)+(4*7)+(3*3)+(2*3)+(1*3)=131
131 % 10 = 1
So 217473-33-1 is a valid CAS Registry Number.

217473-33-1Upstream product

217473-33-1Downstream Products

217473-33-1Relevant articles and documents

Synthesis and reactivity of new β-enamino acid derivatives: A simple and general approach to β-enamino esters and thioesters

Fustero,Garcia de la Torre,Jofre,Perez Carlon,Navarro,Simon Fuentes,Server Carrio

, p. 8825 - 8836 (2007/10/03)

A new strategy has been developed for the synthesis of several β- enamino acid derivatives. N,N'-Carbonyldiimidazole has been used as C- acylating agent of methyl ketimines, providing a direct and simple route to new β-enamino carbonyl imidazole derivatives 2. These derivatives 2 were cleanly and efficiently transformed into β-enamino esters 4 (X = O) and thioesters 4 (X = S) by reaction with a great variety of alcohols and thiols, including tertiary ones. Alternative and complementary routes to compounds 4 were also investigated. In addition, β-keto esters 6 have been obtained by mild acid hydrolysis of β-enamino esters 4.

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