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1026439-78-0

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1026439-78-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1026439-78-0 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,2,6,4,3 and 9 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1026439-78:
(9*1)+(8*0)+(7*2)+(6*6)+(5*4)+(4*3)+(3*9)+(2*7)+(1*8)=140
140 % 10 = 0
So 1026439-78-0 is a valid CAS Registry Number.

1026439-78-0Downstream Products

1026439-78-0Relevant 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 (1996)

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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