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Synthesis of trans-disubstituted-2,3-dihydrobenzofurans by a formal [4 + 1] annulation between para-quinone methides and sulfonium salts†
Organic Chemistry Frontiers ( IF 4.6 ) Pub Date : 2018-02-27 00:00:00 , DOI: 10.1039/c8qo00008e
Ying Zhi 1, 2, 3, 4 , Kun Zhao 1, 2, 3, 4 , Carolina von Essen 5, 6, 7, 8 , Kari Rissanen 5, 6, 7, 8 , Dieter Enders 1, 2, 3, 4
Affiliation  

An efficient protocol for the synthesis of trans-disubstituted-2,3-dihydrobenzofurans through [4 + 1] annulation of para-quinone methides with sulfonium salts has been developed. Under very mild conditions this unprecedented reaction occurs in good to excellent yields (up to 99%), offering a straightforward access to a variety of 2,3-dihydrobenzofurans.

中文翻译:

通过苯醌甲基化物和sulf盐之间的正规[4 +1]环合反应 合成反式-二取代-2,3-二氢苯并呋喃

已开发出一种有效的方案,可通过对醌甲基化物与sulf盐的[4 +1]环合反应合成反式-二取代-2,3-二氢苯并呋喃。在非常温和的条件下,这种空前的反应以良好的产率(高达99%)发生,从而可以直接获得各种2,3-二氢苯并呋喃。
更新日期:2018-02-27
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