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1228785-44-1

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1228785-44-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1228785-44-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,2,8,7,8 and 5 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 1228785-44:
(9*1)+(8*2)+(7*2)+(6*8)+(5*7)+(4*8)+(3*5)+(2*4)+(1*4)=181
181 % 10 = 1
So 1228785-44-1 is a valid CAS Registry Number.

1228785-44-1Downstream Products

1228785-44-1Relevant articles and documents

Reversal of regioselectivity (straight vs. cross ring closure) in the intramolecular [2+2] photocycloaddition of phenanthrene derivatives

Kohmoto, Shigeo,Hisamatsu, Shugo,Mitsuhashi, Hakuei,Takahashi, Masahiro,Masu, Hyuma,Azumaya, Isao,Yamaguchi, Kentaro,Kishikawa, Keiki

, p. 2174 - 2179 (2010)

Intramolecular [2+2] photocycloaddition of aromatic chain imides possessing bis-phenanthrene moieties afforded straight and cross ring closure products. The ratio of cycloadducts was dependent on reaction time and temperature, which resulted in a reversal of regioselectivity. The reaction was proved to involve a retro cycloaddition. The cross ring closure products were formed predominantly in the early stage of the reaction at lower reaction temperature. In contrast, the straight ring closure products were predominant at higher reaction temperature with prolonged irradiation.

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