Dihydrofurans from α-diazoketones: Facile rearrangement of donor-acceptor cyclopropanes
作者:Elizabeth A. Lund、Isaac A. Kennedy、Alex G. Fallis
DOI:10.1016/s0040-4039(00)91809-4
日期:1993.10
The direct synthesis of dihydrofurans 7, 11, and 23–25 from α-diazoketones 3, 8, and 20–22 is described. The cyclopropane intermediates generated upon treatment of the α-diazoketones with metal catalysts in the presence of ethyl vinyl ether rearranged spontaneously. Sensitized of 3 afforded 7 plus cyclobutanone 5 while direct photolysis gave the cyclobutanones 5, and 26–28.
直接合成二氢
呋喃的7,11,和23-25从α-重
氮酮3,8,和20-22中描述。在乙基
乙烯基醚存在下,用
金属催化剂处理α-重
氮酮时自然生成的
环丙烷中间体。敏化3可得到7加
环丁酮5,而直接光解则可得到
环丁酮5和26-28。