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133601-17-9

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133601-17-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 133601-17-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,6,0 and 1 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 133601-17:
(8*1)+(7*3)+(6*3)+(5*6)+(4*0)+(3*1)+(2*1)+(1*7)=89
89 % 10 = 9
So 133601-17-9 is a valid CAS Registry Number.

133601-17-9Downstream Products

133601-17-9Relevant articles and documents

Photocyclization Reactions. Part 3 [1]. Synthesis of Naphtho[1,8-bc]-furans and Cyclohepta[cd]benzofurans Using Photocyclization of 8-Alkoxy-1,2,3,4-tetrahydro-1-naphthalenones and 4-Alkoxy-6,7,8,9-tetrahydro-5H-benzocyclohepten-5-ones

Sharshira, Essam Mohamed,Iwanami, Haruki,Okamura, Mutsuo,Hasegawa, Eietsu,Horaguchi, Takaaki

, p. 17 - 25 (2007/10/03)

Photocyclization reactions were carried out on 8-alkoxy-1,2,3,4-tetrahydro-1-naphthalenones (six-membered ring ketones) 4a-g and 4-alkoxy-6,7,8,9-tetrahydro-5H-benzocyclohepten-5-ones (seven-membered ring ketones) 5a-e in acetonitrile. Irradiation of 4a-f gave rearranged naphthyl alcohols 8a-f as major products. In the case of 4g, 2a,3,4,5-tetrahydronaphtho[1,8-bc]furan-2a-ol 6g was obtained. In contrast, irradiation of 5a-e afforded 2,2a,3,4,5,6-hexahydrocyclohepta[cd]benzofuran-2a-ols 9a-e in good yields. The difference in reactivities between 4a-g and 5a-e is attributed to the conformation of six- and seven-membered rings. Conformational and substituent effects in cyclization step of 1,5-biradicals are discussed along with reaction pathways.

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