Experimental studies of lewis acid catalyzed additions of long chained alcohols to activated 1,4-benzoquinone
摘要:
Lewis acid promoted additions of long chained alcohols to 2-carbomethoxy-1,4-benzoquinone (1) have been examined by using various LAs; AlCl3, TiCl4, MgBr2 and MgCl2. It has been found that the bidentate Lewis acid MgCl2, having ability to coordinate to both carbonyl oxygens (chelate control) of 2-carbomethoxy-1,4-benzoquinone (1), produced the addition product almost quantitatively at mild conditions. The MgCl2 catalyzed additions of alcohols have been utilized in the synthesis of rare 2-alkoxyhydroquinones (7a-e). The reactions between quinone 1, alcohol and AlCl3 or TiCl4 have also been investigated by using NMR spectroscopy. (C) 1998 Elsevier Science Ltd. All rights reserved.
Experimental studies of lewis acid catalyzed additions of long chained alcohols to activated 1,4-benzoquinone
摘要:
Lewis acid promoted additions of long chained alcohols to 2-carbomethoxy-1,4-benzoquinone (1) have been examined by using various LAs; AlCl3, TiCl4, MgBr2 and MgCl2. It has been found that the bidentate Lewis acid MgCl2, having ability to coordinate to both carbonyl oxygens (chelate control) of 2-carbomethoxy-1,4-benzoquinone (1), produced the addition product almost quantitatively at mild conditions. The MgCl2 catalyzed additions of alcohols have been utilized in the synthesis of rare 2-alkoxyhydroquinones (7a-e). The reactions between quinone 1, alcohol and AlCl3 or TiCl4 have also been investigated by using NMR spectroscopy. (C) 1998 Elsevier Science Ltd. All rights reserved.
Experimental studies of lewis acid catalyzed additions of long chained alcohols to activated 1,4-benzoquinone
作者:Osmo E.O. Hormi、Anu M. Moilanen
DOI:10.1016/s0040-4020(97)10409-4
日期:1998.2
Lewis acid promoted additions of long chained alcohols to 2-carbomethoxy-1,4-benzoquinone (1) have been examined by using various LAs; AlCl3, TiCl4, MgBr2 and MgCl2. It has been found that the bidentate Lewis acid MgCl2, having ability to coordinate to both carbonyl oxygens (chelate control) of 2-carbomethoxy-1,4-benzoquinone (1), produced the addition product almost quantitatively at mild conditions. The MgCl2 catalyzed additions of alcohols have been utilized in the synthesis of rare 2-alkoxyhydroquinones (7a-e). The reactions between quinone 1, alcohol and AlCl3 or TiCl4 have also been investigated by using NMR spectroscopy. (C) 1998 Elsevier Science Ltd. All rights reserved.