Rhodium-Catalyzed Asymmetric Ring Opening of Oxabicyclic Alkenes with Sulfur Nucleophiles
作者:Paul Leong、Mark Lautens
DOI:10.1021/jo035730e
日期:2004.3.1
The synthesis of 2-sulfanyl-1,2-dihydro-naphthalen-1-ols is described. This methodology is based on rhodium catalysis and enables various thiols to undergo an asymmetric SN2‘ ring opening of oxabenzonorbornadiene. Under the reaction conditions ([Rh(COD)Cl]2 (2.5 mol %), (S)-(R)-PPF-PtBu2 (6 mol %), AgOTf (7 mol %), NH4I (1.7 equiv), galvinoxyl (5 mol %), THF, 85 °C), aryl- and alkyl-sulfide adducts
描述了2-硫烷基-1,2-二氢萘-1-醇的合成。该方法基于铑催化,并使各种硫醇能够经历氧杂苯并降冰片二烯的不对称S N 2'开环。在反应条件下(的[Rh(COD)CL] 2(2.5摩尔%),(小号) - ([R )- PPF-P吨得到良好至优异的Bu 2(6 mol%),AgOTf(7 mol%),NH 4 I(1.7当量),加尔维诺尔(5 mol%),THF,85°C,芳基和烷基硫化物加合物收率高且对映体过量(> 90%ee)。