Synthesis of allylic sulfonic acids via regioselective Pd-catalyzed allylic substitutions of Na 2 SO 3
摘要:
Palladium-catalyzed allylic sulfonations of the linear allylic carbonates with sodium sulfite (Na2SO3) were accomplished under mild conditions. This method gave allylic sulfonic acids in good to excellent yields with high level of regioselectivities. (C) 2015 Elsevier Ltd. All rights reserved.
Tandem Iridium Catalysis as a General Strategy for Atroposelective Construction of Axially Chiral Styrenes
作者:Jie Wang、Xiaotian Qi、Xiao-Long Min、Wenbin Yi、Peng Liu、Ying He
DOI:10.1021/jacs.1c04400
日期:2021.7.21
Axiallychiral styrenes are of great interest since they may serve as a class of novel chiral ligands in asymmetric synthesis. However, only recently have strategies been developed for their enantioselective preparation. Thus, the development of novel and efficient methodologies is highly desirable. Herein, we reported the first tandem iridium catalysis as a general strategy for the synthesis of axially
A One-Pot Palladium-Catalyzed Allylic Alkylation and Wittig Reaction of Phosphorus Ylides
作者:Wen-Bo Liu、Hu He、Li-Xin Dai、Shu-Li You
DOI:10.1002/chem.201000316
日期:2010.7.5
Put a(n) (y)lid(e) on it! The one‐pot palladium‐catalyzed allylic alkylation and Wittigreaction of phosphorus ylides with various aldehydes and ketenes has been realized, which produce skipped dienes, including trisubstituted alkenes and tetrasubstituted allenes, respectively (see scheme), in moderate to good overall yields.
Catalytic Asymmetric Umpolung Allylation/2-Aza-Cope Rearrangement for the Construction of α-Tetrasubstituted α-Trifluoromethyl Homoallylic Amines
作者:Chong Shen、Ruo-Qing Wang、Liang Wei、Zuo-Fei Wang、Hai-Yan Tao、Chun-Jiang Wang
DOI:10.1021/acs.orglett.9b02543
日期:2019.9.6
A general protocol for the preparation of enantioenriched α-tetrasubstituted α-trifluoromethyl homoallylicamines is disclosed. Despite the significant challenge in stereoselectivity control, Ir-catalyzed asymmetric cascade umpolung allylation/2-aza-Cope rearrangement of trifluoromethylated fluorenone imines with allylic carbonates was realized with excellent efficiency and remarkable stereoselectivity
Synthesis of Chiral Allylic Thioesters: Enantio- and Regioselective Iridium-Catalyzed Allylations of KSAc
作者:Ning Gao、Xiaoming Zhao
DOI:10.1002/ejoc.201201640
日期:2013.5
Chiral allylic thioesters were synthesized through a direct iridium-catalyzed asymmetric allylation of KSAc in the presence of KOAc. This strategy provided branched allylic thioesters in good yields with the high levels of enantioselectivity.