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Studies on Heteropentales. IV : Heteroannelations to Pyrrolo[2,1-b]benzothiazole and Pyrrolo[2,1-b]thiazoles

Bulletin of the Chemical Society of Japan Volume 55 Issue 1 Page 200-203
published_at 1982
Title
Studies on Heteropentales. IV : Heteroannelations to Pyrrolo[2,1-b]benzothiazole and Pyrrolo[2,1-b]thiazoles
Creators Abe Noritaka
Creators Nishiwaki Tarozaemon
Creators Omori Toshimasa
Creators Harada Emiko
2,3-Dibenzoylpyrrolo[2,1-b]benzothiazole (2) and 6,7-dibenzoylpyrrolo[2,1-b]thiazoles (5a-b) have been synthesized by utilizing the cycloaddition reactions of imidazo[2,1-b]benzothiazole and imidazo[2,1-b]thiazoles, respectively, with dibenzoylacetylene followed by the elimination of a nitrile from each of the cycloadducts. Heteroannelations to 2 and 5 have been achieved by their reactions with hydrazine, aminoacetonitrile, ethyl glycinate, and phosphorus pentasulfide. The annelations by the second and third reagents proceed fairly regioselectively. Facile dimerizations of thieno[3',4':3,4]pyrrolo[2,1-b]benzothiazole and thieno[3',4':3,4]pyrrolo[2,1-b]thiazoles to be produced by the reactions with the last reagent are also described.
Languages eng
Resource Type journal article
Publishers 日本化学会
Date Issued 1982
File Version Not Applicable (or Unknown)
Access Rights metadata only access
Relations
[ISSN]0009-2673
[NCID]AA00580132
https://doi.org/10.1246/bcsj.55.200
[isVersionOf] [URI]http://www.jstage.jst.go.jp/browse/bcsj/-char/en
Schools 大学院医学系研究科(理学)