Controllable Access to Diazo-functionalized 2-Methylene-2,3-dihydrofurans and Diazo-functionalized Furans from Enynones and Diazo Carbonyl Compounds
作者:Yu Zhang、Guisheng Deng
DOI:10.1021/acs.joc.3c01169
日期:2023.12.15
Using enynones and diazo carbonyl compounds as identical starting materials, methods for chemoselective and regioselective constructs of diazo-functionalized 2-methylene-2,3-dihydrofurans and diazo-functionalized trisubstituted furans have been established in a AgSbF6/DBU/DCE/0 °C system and a AgSbF6/DBU/Et2O·BF3/DCE/0 °C system, respectively. A Lewis acid and organic base cocontrolled reaction for
使用烯酮和重氮羰基化合物作为相同的起始原料,在 AgSbF 6 /DBU/DCE/0 ° 中建立了重氮官能化 2-亚甲基-2,3-二氢呋喃和重氮官能化三取代呋喃的化学选择性和区域选择性构建方法。 C系统和AgSbF 6 /DBU/Et 2 O·BF 3 /DCE/0℃系统分别。用于合成重氮官能化三取代呋喃的路易斯酸和有机碱共控反应并不常见。对于重氮官能化2-亚甲基-2,3-二氢呋喃的合成,该反应具有优异的非对映选择性和Z-选择性。基于Rh 2 (OAc) 4介导的重氮官能化2-亚甲基-2,3-二氢呋喃的独特分解,应用于非对映选择性构建5-亚甲基-4,7-二氢-5 H-呋喃[首次实现了2,3- c ]吡喃骨架。