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111853-19-1

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111853-19-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 111853-19-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,1,8,5 and 3 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 111853-19:
(8*1)+(7*1)+(6*1)+(5*8)+(4*5)+(3*3)+(2*1)+(1*9)=101
101 % 10 = 1
So 111853-19-1 is a valid CAS Registry Number.

111853-19-1Downstream Products

111853-19-1Relevant 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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