Indium-Mediated Selective Introduction of a 1,3-Butadien-2-yl Group at the C4-Position in 2-Azetidinones and Application of 1,3-Diene-Tethered 2-Azetidinones in the Diels–Alder Reaction
作者:Kooyeon Lee、Phil Ho Lee
DOI:10.1002/chem.200700796
日期:2007.10.26
The reaction of 4-acetoxy-2-azetidinones with organoindium reagents generated in situ from indium and 1,4-dibromo-2-butyne in the presence of LiCl in DMF selectively produced 2-azetidinones which contain a 1,3-butadienyl-2-yl group at the C4-position in good yields. The Diels-Alder reaction of 4-[(1-methylene)prop-2-enyl]-2-azetidinones with a variety of dienophiles provided 2-azetidinones with valuable
4-乙酰氧基-2-氮杂环丁酮与铟和1,4-二溴-2-丁炔在DMF中的LiCl存在下原位生成的有机铟试剂的反应选择性生成了包含1,3-丁二烯基-2的2-氮杂环丁酮C4位置的C-基团具有良好的收率。4-[(1-亚甲基)丙-2-烯基] -2-氮杂环丁酮与各种亲二烯物的Diels-Alder反应提供了2-氮杂环丁酮,其在C4位的C4位带有有价值的官能团取代的六元环。良品率高。