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98601-03-7

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98601-03-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 98601-03-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,8,6,0 and 1 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 98601-03:
(7*9)+(6*8)+(5*6)+(4*0)+(3*1)+(2*0)+(1*3)=147
147 % 10 = 7
So 98601-03-7 is a valid CAS Registry Number.

98601-03-7Downstream Products

98601-03-7Relevant articles and documents

Purines. LVII. Regioselective alkylation of N6,9-disubstituted 8- oxoadenines: Syntheses of the sea anemone purine caissarone and some positional isomers and analogues

Saito,Mori,Chikazawa,Kanai,Fujii

, p. 1746 - 1752 (2007/10/02)

The first total synthesis of caissarone hydrochloride (1), a constituent of the sea anemone Bunodosoma caissarum, has been accomplished via a two- step route starting from N6,9-dimethyl-8-oxoadenine (3), which is obtainable from 9-methyladenine (5) through a four-step route. The key step in the synthesis is the regioselective methylation of 3 at N(3), which has been designed on the basis of a methylation study of N6-benzyl-9-methyl-8- oxoadenine (11). Some positional isomers (19, 24, and 31) and analogues (8, 26, and 32) of 1 have also been synthesized. A 1H-NMR spectroscopic study has suggested that the free base (23) of caissarone is capable of forming a hetero-base pair (such as 41) with 2',3',5'-tri-O-acetylguanosine (40) in Me2SO-d6.

Purines. XLIII. A total synthesis of the marine sponge base 6-imino-1,9-dimethyl-8-oxopurine

Fujii,Saito,Mori

, p. 2146 - 2150 (2007/10/02)

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