AbstractAn iron(III)‐Schiff base‐catalyzed, highly enantioselective hydrophosphonylation of various aldehydes is described. Under the optimized reaction conditions, 5 mol% of the iron/camphor‐based tridentate Schiff base complex [FeCl(SBAIB‐d)]2 produces high yields (up to 99%) of α‐hydroxy phosphonates in excellent enantioselectivities (up to 99%). The merits of this catalytic system are an easily synthesizable catalyst, inexpensive starting materials, practically simple aerobic reaction conditions, and low catalyst loading (5 mol%).magnified image
Convenient synthesis of α-diarylmethylphosphonates by HOTf catalyzed Friedel-Crafts arylation of α-aryl α-hydroxyphosphonates
作者:Long Chen、Yun-Xiang Zou、Xin-Yue Fang、Xu Yin
DOI:10.1080/10426507.2017.1393424
日期:2018.3.4
GRAPHICAL ABSTRACT ABSTRACT We report a convenient catalytic Friedel-Crafts arylation of α-aryl α-hydroxyphosphonates with various (hetero)aromatic compounds. HOTf (trifluoromethanesulfonic acid) is identified to be the best Brønstedacid catalyst, and the desired α-diarylmethylphosphonates were obtained in up to 41–95% yield.