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113250-77-4

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113250-77-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 113250-77-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,3,2,5 and 0 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 113250-77:
(8*1)+(7*1)+(6*3)+(5*2)+(4*5)+(3*0)+(2*7)+(1*7)=84
84 % 10 = 4
So 113250-77-4 is a valid CAS Registry Number.

113250-77-4Relevant articles and documents

Benzyne Cyclization Route to Benzophenanthridine Alkaloids. Synthesis of Chelerythrine, Decarine, and Nitidine

Kessar, Satinder V.,Gupta, Yash P.,Balakrishnan, Prasanna,Sawal, Kewal K.,Mohammad, Taj,Dutt, Mahesh

, p. 1708 - 1713 (2007/10/02)

The alkaloids chelerythrine (8b) and decarine (7c) have been synthesized through a benzyne-mediated cyclization of N-(2-halobenzyl)-1-naphthylamines 4 with KNH2 in ammonia/ether.The 7-hydroxybenzophenanthridine structure 16a proposed for the alkaloid fagaridine is questioned on the basis of comparison with a model compound (16b) synthesized by benzyne cyclization.For the 8,9-oxygenated alkaloids like nitidine (8i), this cyclization proceeded poorly, but a dramatic improvement occurred when LDA/THF at -78 deg C was used instead of KNH2/NH3.

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