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273401-99-3

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273401-99-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 273401-99-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,7,3,4,0 and 1 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 273401-99:
(8*2)+(7*7)+(6*3)+(5*4)+(4*0)+(3*1)+(2*9)+(1*9)=133
133 % 10 = 3
So 273401-99-3 is a valid CAS Registry Number.

273401-99-3Downstream Products

273401-99-3Relevant articles and documents

Synthesis of some new spiro(pyran-4,2'-oxazolidine) and pyridoxazolidine derivatives

Soliman

, p. 1269 - 1279 (2007/10/03)

Ketene S,S-acetal 2 reacts with aminoethanol to afford 2-(1-aceta1-2-oxo propylidine)oxazolidine 3 which was allowed to react with some active methylene compounds having an α- cyano or α-keto group to give spiro(pyran -4,2'-oxazolidine) derivatives 5-11.

Synthesis of Heterocyclic Ketene N,O-Acetals and Their Reactions with α,β-Unsaturated Esters

Huang, Zhi-Tang,Zhang, Ping-Cheng

, p. 2011 - 2016 (2007/10/02)

Ketene dithioacetals 2 react with 2-aminoethanol or 1-amino-2-propanol to afford the corresponding substituted 2-methyleneoxazolidines 3 and 4.In some cases, 3 and 4 react with α,β-unsaturated esters to give 5H-oxazolopyridine derivatives 5 by an e

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