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202871-67-8

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202871-67-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 202871-67-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,2,8,7 and 1 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 202871-67:
(8*2)+(7*0)+(6*2)+(5*8)+(4*7)+(3*1)+(2*6)+(1*7)=118
118 % 10 = 8
So 202871-67-8 is a valid CAS Registry Number.

202871-67-8Relevant articles and documents

Chemoselective isomerization of amide-substituted oxetanes with Lewis acid to give oxazine derivatives or bicyclic amide acetals

Nishimura, Tomonari,Kanoh, Shigeyoshi,Senda, Hitoshi,Tanaka, Toshiyuki,Ando, Kohji,Ogawa, Hiroshi,Motoi, Masatoshi

, p. 43 - 44 (1998)

The Lewis-acid catalyzed isomerization of secondary and tertiary amide-substituted oxetanes takes place chemoselectively, giving 5-hydroxymethyl-5,6-dihydro-4H-1,3-oxazines and reactive amide acetals consisting of a bicyclo[2.2.2]octane skeleton, respectively.

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