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.
A Novel Nickel(0)-Catalyzed Cascade Ullmann-Pinacol Coupling: From <i>o</i>-Bromobenzaldehyde to <i>trans</i>-9,10-Dihydroxy-9,10-dihydrophenanthrene
作者:Tian-pa You、Shuang-zheng Lin、Qing-an Chen
DOI:10.1055/s-2007-984543
日期:——
Using 5 mol% of (Ph3P)2NiCl2 as a catalyst, Zn powder as a reductant, ortho-carbonyl-substituted aryl halides could be coupled to form trans-9,10-dihydroxy-9,10-dihydrophenanthrenes in a one-pot cascade reaction.