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91735-40-9

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91735-40-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 91735-40-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,7,3 and 5 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 91735-40:
(7*9)+(6*1)+(5*7)+(4*3)+(3*5)+(2*4)+(1*0)=139
139 % 10 = 9
So 91735-40-9 is a valid CAS Registry Number.

91735-40-9Downstream Products

91735-40-9Relevant articles and documents

C(6)-N(7)-Cyclized Purines

Griengl, H.,Hayden, W.,Plessing, A.

, p. 333 - 336 (2007/10/02)

By reaction of 6-aminopurine (2a) and of the corresponding 3-hydroxypropyl derivative 2b with thionyl chloride a bridge to N(1) is formed yielding 5 and 6, respectively, whereas from 6-aminopurine (2c) the 4-chlorobutyl compound 4 is obtained, which cyclizes in alkaline medium to the C(6)-N(7) bridged compound 7.A related cyclization to 11a-11f is observed when 6-chloropurines are reacted with 3-alkyl-1,3-oxazolidines or 3-methyl-1,3-thiazolidine.

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