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1248340-80-8

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1248340-80-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1248340-80-8 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,4,8,3,4 and 0 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1248340-80:
(9*1)+(8*2)+(7*4)+(6*8)+(5*3)+(4*4)+(3*0)+(2*8)+(1*0)=148
148 % 10 = 8
So 1248340-80-8 is a valid CAS Registry Number.

1248340-80-8Relevant articles and documents

Multisubstituted benzo[b]furans through a copper- and/or palladium-catalyzed assembly and functionalization process

Arcadi, Antonio,Blesi, Federico,Cacchi, Sandro,Fabrizi, Giancarlo,Goggiamani, Antonella,Marinelli, Fabio

, p. 1857 - 1871 (2013/04/10)

Full details as well as the study of the scope, limitations, and further elaboration of a straightforward approach to the synthesis of 2,5,7-trisubstituted benzo[b]furans from 2-bromo- and 2-chloro-6-iodo-4- substituted phenols through a consecutive copper- and/or palladium-catalyzed assembly and functionalization process is described. Functionalization at the C(7) position is carried out by Suzuki-Miyaura cross-coupling, alkynylation, alkenylation, and C-N bond forming reactions. A one-pot protocol for the synthesis of 2,5,7-trisubstituted benzo[b]furans is also reported.

Controlled synthesis of 2-and 3-substituted benzo[ b ]furans

Pei, Tao,Chen, Cheng-Yi,Dimichele, Lisa,Davies, Ian W.

supporting information; experimental part, p. 4972 - 4975 (2010/12/25)

A controlled regioselective synthesis of either C-2 or C-3 substituted benzo[b]furans from readily accessible 1-(2-hydroxyphenyl)-2-chloroethanones is described. Addition of a range of Grignard reagents to the α-chloro ketones generates alkoxide intermediates, which can form either 2-substituted benzo[b]furans via a [1,2]-aryl migration or 3-substituted benzo[b]furans via a direct cyclization and dehydration sequence. A temperature-dependent [1,2]-aryl migration mechanism for the formation of 2-substituted benzo[b]furan is proposed.

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