An intermolecular radical cascadereaction between readily prepared o‐methylthio‐arylamines or o‐methylselanyl‐arylamines and alkynes for the preparation of valuable benzothiophenes or benzoselenophenes is reported. These transformations occur efficiently with complete regioselectivity and the products are obtained in moderate to good yields. The current protocol is successfully applied to the synthesis
Compounds of the Formula
and pharmaceutically acceptable salts thereof, wherein X
1
, X
2
, X
3
, X
4
, X
5
, X
6
, X
7
, R
1
, and Q
1
are defined herein, inhibit protein kinase enzymes and are useful for the treatment and/or prevention of hyperproliferative diseases such as cancer, inflammation, psoriasis, allergy/asthma, disease and conditions of the immune system, disease and conditions of the central nervous system.
Banfield et al., Journal of the Chemical Society, 1956, p. 4791,4798
作者:Banfield et al.
DOI:——
日期:——
Visible Light Photocatalytic Synthesis of Benzothiophenes
作者:Durga Prasad Hari、Thea Hering、Burkhard König
DOI:10.1021/ol302517n
日期:2012.10.19
The photocatalytic reaction of o-methylthio-arenediazonium salts with alkynes yields substituted benzothiophenes regioselectively through a radical annulation process. Green light irradiation of eosin Y initiates the photoredox catalysis. The scope of the reaction was investigated by using various substituted diazonium salts and different alkynes.
Clark, Peter David; Clarke, Kenneth; Ewing, David F., Journal of Chemical Research, Miniprint, 1981, # 10, p. 3863 - 3883
作者:Clark, Peter David、Clarke, Kenneth、Ewing, David F.、Scrowston, Richard M.、Kerrigan, Frank