作者:Chieh-Kai Chan、Yi-Chia Chen、Yeh-Long Chen、Meng-Yang Chang
DOI:10.1016/j.tet.2015.10.060
日期:2015.12
phenanthrofurans 1 starting with deoxybenzoins 3 is developed with moderate to good yield. A facile process is carried out for the (1) α-propargylation of 3 with NaH and propargyl bromide 2 in refluxing THF, (2) Bi(OTf)3-mediated cycloisomerization of γ-ynones 4 with 4 Å molecular sieves in MeNO2 at rt, and (3) photolytic Scholl annulation of 2,3-diarylfurans 5 with I2 in EtOAc at rt. The key structures of
朝向phenanthrofurans三步协议1开始deoxybenzoins 3与中度至良好的产率显影。一种简便方法进行的(1)的α-炔丙基3用NaH和炔丙基溴2在回流的THF中,(2)毕(OTF)3 γ-ynones的介导环异构4与米诺4埃分子筛2在室温下,和(3)光解舍尔2,3- diarylfurans环5与I 2在EtOAc中的搅拌溶液。的按键结构1通过X-射线晶体分析证实。