A novel synthesis of 2,3-dihydro-1H-thieno[3,4-b]pyrroles via ring transformation of cyclic sulfonium ylides by titanium(IV) chloride-triethylamine system

被引：5

作者：

Maruoka, H ^{[1
]}

Yamagata, K ^{[1
]}

Okabe, F ^{[1
]}

Tomioka, Y ^{[1
]}

机构：

[1] Fukuoka Univ, Fac Pharmaceut Sci, Jonan Ku, Fukuoka 8140180, Japan

来源：

JOURNAL OF HETEROCYCLIC CHEMISTRY | 2005年 / 42卷 / 04期

关键词：

D O I：

10.1002/jhet.5570420438

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

A series of cyclic sulfonium ylides 4a-h reacted with titanium(IV) chloride in the presence of triethylamine to give the corresponding fused 2,3-dihydro-1H-thieno[3,4-b]pyrroles 5a-h, via a ring opening and recyclization. In contrast, treatment of compounds 4a, 4b, 4e and 4f with titanium(IV) chloride, triethylamine and dimethylamine hydrochloride gave the corresponding thiophenes 6a, 6b, 6e and 6f. Furthermore, compounds 6a and 6b easily underwent cyclization with sodium hydride to afford the corresponding 5a and 5b.

引用

页码：717 / 721

页数：5

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