Site- and Stereoselectivity in the Photochemical Oxetane Formation Reaction (Paternò–Büchi Reaction) of Tetrahydrobenzofuranols with Benzophenone: Hydroxy-directed Diastereoselectivity?
作者:Youhei Yabuno、Yoshikazu Hiraga、Manabu Abe
DOI:10.1246/cl.2008.822
日期:2008.8.5
The Paterno-Buchi reactions of tetrahydrobenzofuranols with benzophenone were investigated to reveal site- and stereoselectivity in oxetane formation reactions. Both selectivities were found to be largely dependent on the reaction temperature. The trans selectivity increased with a decrease in temperature, and the more-substituted oxetanes were selectively formed at high temperature.
研究了四氢苯并呋喃醇与二苯甲酮的 Paterno-Buchi 反应,以揭示氧杂环丁烷形成反应中的位点和立体选择性。发现两种选择性在很大程度上取决于反应温度。反式选择性随着温度的降低而增加,并且在高温下选择性地形成更多取代的氧杂环丁烷。