Synthesis of 9,9′-biphenanthryl-10,10′-bis(oxazoline)s and their preliminary evaluations in the Friedel–Crafts alkylations of indoles with nitroalkenes
作者:Shuang-zheng Lin、Tian-pa You
DOI:10.1016/j.tet.2008.11.083
日期:2009.1
Chiral 9,9′-biphenanthryl-10,10′-bis(oxazoline)s 6a–d were firstly prepared. These new chiral compounds were evaluated as ligands for the Friedel–Craftsalkylations of indoles with nitroalkenes, excellent yields and modest to good enantioselectivities were achieved.