title: Catalytic Enantioselective Protonation/Nucleophilic Addition of Diazoesters with Chiral Oxazaborolidinium Ion Activated Carboxylic Acids.
abstract: A new chiral Brønsted acid derived from carboxylic acid and a chiral oxazaborolidinium ion (COBI), as an activator, is introduced. This acid was successfully applied as a catalyst for the highly enantioselective protonation/nucleophilic addition of diazoesters with carboxylic acids.
authors.affiliation: Department of Chemistry, Sungkyunkwan University, 300, Cheoncheon, Jangan, Suwon, 16419, Korea.|Western Seoul Center, Korea Basic Science Institute, 150, Bugahyeon-ro, Seodaemun-gu, Seoul, 03759, Korea.
authors.forename: Ki-Tae
authors.initials: KT
authors.lastname: Kang
authors.affiliation: Department of Chemistry, Sungkyunkwan University, 300, Cheoncheon, Jangan, Suwon, 16419, Korea.
authors.forename: Seung Tae
authors.initials: ST
authors.lastname: Kim
authors.affiliation: Western Seoul Center, Korea Basic Science Institute, 150, Bugahyeon-ro, Seodaemun-gu, Seoul, 03759, Korea.
authors.forename: Geum-Sook
authors.initials: GS
authors.lastname: Hwang
authors.affiliation: Department of Chemistry, Sungkyunkwan University, 300, Cheoncheon, Jangan, Suwon, 16419, Korea.
authors.forename: Do Hyun
authors.initials: DH
authors.lastname: Ryu
keywords: Brønsted acid; asymmetric catalysis; boron; diazo compounds; reaction mechanisms