Organocatalytic asymmetric Michael addition of 2-naphthols to alkylideneindolenines generated in situ from arenesulfonylalkylindoles
                                
                                    
                                        作者:Liangliang Yu、Xiaohua Xie、Song Wu、Rongming Wang、Wujun He、Dabin Qin、Quanzhong Liu、Linhai Jing                                    
                                    
                                        DOI:10.1016/j.tetlet.2013.05.011
                                    
                                    
                                        日期:2013.7
                                    
                                    An efficient enantioselective Michael addition of 2-naphthols to alkylideneindolenines generated in situ from arenesulfonylalkylindoles has been described. The protocol provides an efficient and convenient access to C-3 alkyl-substituted indole derivatives containing phenolic hydroxyl groups with high yields (up to 96%) and enantioselectivities (up to 98% ee) under mild conditions. (C) 2013 Elsevier Ltd. All rights reserved.