Synthesis of thiophene-based TAK-779 analogues by C-H arylation

Anna Junker, Junichiro Yamaguchi, Kenichiro Itami*, Bernhard Wünsch

*この研究の対応する著者

研究成果: Article査読

25 被引用数 (Scopus)

抄録

A rapid synthesis of thiophene-based TAK-779 analogues 1 is reported using a late-stage diversification strategy. At the end of the synthesis, the key building block 2, which was prepared in six steps from thiophene, was arylated regioselectively at the α-position directly with iodoarenes. Since 2 offers several reactive positions, various established catalyst systems were tested. It was found that Crabtree catalyst (an Ir catalyst) converted efficiently and selectively the thiophene system 2 into 2-aryl-substituted compounds 9. The direct C-H arylation of 2 with electron-rich iodoarenes led to high yields, whereas electron-deficient iodoarenes required longer reaction times for complete conversion. A small set of diverse amides 1 was synthesized by hydrolysis of 9 and subsequent HATU coupling with primary amines 4.

本文言語English
ページ(範囲)5579-5586
ページ数8
ジャーナルJournal of Organic Chemistry
78
11
DOI
出版ステータスPublished - 2013 6月 7
外部発表はい

ASJC Scopus subject areas

  • 有機化学

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