The acid catalyzed cyclization of diazoketones: Preparation of 2,4(3H,5H) furandiones
作者:R.D Miller、W Theis
DOI:10.1016/s0040-4039(00)95905-7
日期:1987.1
Diazoketones derived from substituted ethyl hydrogen malonates produced by the selective hydrolysis of the corresponding malonate esters cyclize in the presence of catalytic amounts of boron trifluoride etherate in methanol to yield 2,4(3H,5H) furandiones. The cyclic keto orthoesters appear to be intermediates in the reaction.
通过在
甲醇中催化量的
三氟化硼醚化物的存在下,由相应的
丙二酸酯的选择性
水解产生的由取代的
丙二酸氢
乙酯生成的重
氮酮环化,生成2,4(3H,5H)
呋喃二酮。环状酮基原酸酯似乎是反应中的中间体。