1027476-96-5Relevant articles and documents
Catalyst-Controlled Regioselective Chlorination of Phenols and Anilines through a Lewis Basic Selenoether Catalyst
Dinh, Andrew N.,Maddox, Sean M.,Vaidya, Sagar D.,Saputra, Mirza A.,Nalbandian, Christopher J.,Gustafson, Jeffrey L.
, p. 13895 - 13905 (2020/11/03)
We report a highly efficient ortho-selective electrophilic chlorination of phenols utilizing a Lewis basic selenoether catalyst. The selenoether catalyst resulted in comparable selectivities to our previously reported bis-thiourea ortho-selective catalyst, with a catalyst loading as low as 1%. The new catalytic system also allowed us to extend this chemistry to obtain excellent ortho-selectivities for unprotected anilines. The selectivities of this reaction are up to >20:1 ortho/para, while the innate selectivities for phenols and anilines are approximately 1:4 ortho/para. A series of preliminary studies revealed that the substrates require a hydrogen-bonding moiety for selectivity.
Highly effective and enantioselective α-amination of aldehydes promoted by chiral proline amide-thiourea bifunctional catalysts
Fu, Ji-Ya,Huang, Qing-Chun,Wang, Qiao-Wei,Wang, Li-Xin,Xu, Xiao-Ying
experimental part, p. 4870 - 4873 (2010/10/02)
A series of secondary amine-thiourea catalysts derived from l-proline and chiral diamine were prepared and first applied to highly enantioselective amination of unmodified aldehydes with various azodicarboxylates in excellent yields (up to 99%) and enanti