A facile synthesis of highly functionalized dihydrofurans based on 1,4-diazabicyclo[2.2.2]octane (DABCO) catalyzed reaction of halides with enones
作者:Zhanjun Yang、Mingjin Fan、Ruizhu Mu、Weimin Liu、Yongmin Liang
DOI:10.1016/j.tet.2005.07.009
日期:2005.9
Treatment of halides 5 with electrophilic alkenes 2 afforded the corresponding dihydrofurans 3 and 4 in the presence of 1, 4-diazabicyclo[2.2.2]octane (DABCO) with good to excellent yields and in a stereoselective manner in most cases. Moreover, the stereoisomers 3 and 4 could be easily transformed each other in the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU).
在1,4-二氮杂双环[2.2.2]辛烷(DABCO)存在下,用亲电子烯烃2处理卤化物5得到相应的二氢呋喃3和4,在大多数情况下以良好的至优异的产率和立体选择性。此外,在1,8-二氮杂双环[5.4.0]十一烷基-7-烯(DBU)的存在下,立体异构体3和4可以容易地彼此转化。