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99767-31-4

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99767-31-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 99767-31-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,7,6 and 7 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 99767-31:
(7*9)+(6*9)+(5*7)+(4*6)+(3*7)+(2*3)+(1*1)=204
204 % 10 = 4
So 99767-31-4 is a valid CAS Registry Number.

99767-31-4Downstream Products

99767-31-4Relevant articles and documents

Regioselective synthesis of α,α-dialkylcyclopentanones from 1-hydroxycyclobutanecarboxylic acid or from O-protected cyclobutanone cyanohydrin

Estieu, Karine,Ollivier, Jean,Salauen, Jacques

, p. 8075 - 8090 (1998)

1-(1-Hydroxyalkyl)cyclobutanols 4a-f, readily available either from 1-hydroxycyclobutane carboxylic acid or from O-protected cyclobutanone cyanohydrin, appeared the most suitable precursors for a regioselective synthesis of cyclopentanones α,α- disubstituted with various similar or different alkyl, alkenyl, aryl or cycloalkyl groups. The key steps consist of acid or Grignard reagent induced C4→C5 ring expansions.

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