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131667-55-5

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131667-55-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 131667-55-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,6,6 and 7 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 131667-55:
(8*1)+(7*3)+(6*1)+(5*6)+(4*6)+(3*7)+(2*5)+(1*5)=125
125 % 10 = 5
So 131667-55-5 is a valid CAS Registry Number.

131667-55-5Downstream Products

131667-55-5Relevant articles and documents

REGIOSELECTIVE INTRODUCTION OF ALKYL GROUPS TO THE POSITION α OR γ TO NITROGEN ATOM OF PIPERIDINE SKELETONS USING ANODIC OXIDATION IN A KEY STEP

Shono, Tatsuya,Terauchi, Jun,Ohki, Yoshihisa,Matsumura, Yoshihiro

, p. 6385 - 6386 (1990)

β,γ-Unsaturated N-alkoxycarbonyl-α-methoxypiperidines, which were prepared from N-alkoxypiperidines by using anodic oxidation in a key step, were regioselectively alkylated at the α-position by using Grignard reagents in the presence of BF3*Et2O, whereas in the presence of CuBr, the alkylation took place at the γ-position.

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