A synthetic approach to crown ether analogs by the remote photocyclization with a pai system of phthalimide and methylthio groups期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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A synthetic approach to crown ether analogs by the remote photocyclization with a pai system of phthalimide and methylthio groups

Authors:	Masao Wada Hideo Nakai Yasuhiko Sato Yuichi Kanaoka

Institution:	Organic Chemistry Research Laboratory, Tanabe Seiyaku Co., Ltd., Toda, Saitama 335, Japan;Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060 Japan

Abstract:	Upon irradiation a homologous series of certain phthalimides ( $2a$ - $c$ ) possessing a terminal sulfide function in their N-poly-ether side chain undergo regioselective remote photocyclization affording seven to fifteen-membered crown ether analogs ( $3a$ - $c$ ) in moderate yields.

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