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155258-44-9

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155258-44-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 155258-44-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,5,2,5 and 8 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 155258-44:
(8*1)+(7*5)+(6*5)+(5*2)+(4*5)+(3*8)+(2*4)+(1*4)=139
139 % 10 = 9
So 155258-44-9 is a valid CAS Registry Number.

155258-44-9Downstream Products

155258-44-9Relevant articles and documents

6-Demethyl-6-halo- and 6-Demethyl-6-thiomitomycins: Synthesis of Novel Mitomycin Derivatives Involving a Tandem Michael Addition/Retro-Mannich Reaction Sequence

Arai, Hitoshi,Kasai, Masaji

, p. 1087 - 1094 (2007/10/02)

Synthesis of novel 6-demethyl-6-halomitomycins (3, 4, 6, and 7) and 6-demethyl-6-thiomytomycins (5 and 8) is described from key intermediates, namely, 6-demethyl-7,7-(ethylenedioxy)-6,6-dihalo-6,7-dihydromitosanes (18 and 19) and 6-demethyl-7,7-(ethylenedioxy)-6,7-dihydro-6-thiomitosane (20), respectively.Compounds 18-20 were prepared through a tandem Michael addition and a retro-Mannich reaction sequence (N-halosucinimide or cationic arylsulfenyl species in the presence of Et2NH) on 10.

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