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4166-31-8

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4166-31-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4166-31-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,1,6 and 6 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 4166-31:
(6*4)+(5*1)+(4*6)+(3*6)+(2*3)+(1*1)=78
78 % 10 = 8
So 4166-31-8 is a valid CAS Registry Number.

4166-31-8Downstream Products

4166-31-8Relevant articles and documents

ALKYLATION OF SOME 6-SUBSTITUTED PURINES UNDER INTERPHASE CATALYSIS CONDITIONS

Ramzaeva, N. P.,Goncharova, L. N.,Lidak, M. Yu.,Gol'dberg, Yu. Sh.,Shimanskaya, M. V.

, p. 93 - 98 (2007/10/02)

The mixture of 9-, 3-, and 7-benzyl-6-substituted purines is formed in almost quantitative yield by the alkylation of 6-benzylamino-, 6-furfurylamino-, 6-methylthio-, and 6-chloropurine with benzyhalides in the biphasic system of the liquid-liquid or liquid-solid type in the presence of interphase catalysts (quarternary ammonium salts, 18-crown-6).The catalytic activity of the quarternary ammonium salts increases with the inrease in the lipophilicity of the cation.Taking the alkylation of 6-benzylaminopurine as an example, the possibility of the application of ''triphasic catalysis'' in the alkylation reaction of purines is indicated.The alkylation of 6-substituted purines with isopropylbromide proceeds regioselectively under the conditions of the interphase catalysis with the formation of the corresponding 9-isopropylpurines.

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