作者:Andrew Whyte、Katherine I. Burton、Jingli Zhang、Mark Lautens
DOI:10.1002/anie.201808460
日期:2018.10.15
An enantioselective copper‐catalyzed intramolecular borylacylation is reported. The reaction proceeds through an initial enantioselective borylcupration of the styrene, followed by a nucleophilic attack on the tethered carbamoyl chloride. The products, chiral borylated 3,3‐disubstituted oxindoles, were generated in excellent yields and enantioselectivities. The versatile carbon–boron bond provides
Palladium-Catalyzed Sequential Vinylic C–H Arylation/Amination of 2-Vinylanilines with Aryl boronic Acids: Access to 2-Arylindoles
作者:Ruixia Yu、Dejun Li、Fanlong Zeng
DOI:10.1021/acs.joc.7b02728
日期:2018.1.5
A palladium-catalyzed selective and successive vinylic C–H arylation/amination of 2-vinylanilines with arylboronic acids to generate indoles has been developed. This procedure represents a straightforward and practical approach to valuable multifunctionalized indoles.
Direct Electrophilic C−H Alkynylation of Unprotected 2-Vinylanilines
作者:Lucien D. Caspers、Peter Finkbeiner、Boris J. Nachtsheim
DOI:10.1002/chem.201606026
日期:2017.2.24
Unprotected aromatic amines can be used as directing groups in metal‐catalyzed C−H alkynylations of alkenes. By using low amounts of an IrIII catalyst in combination with alkynylbenziodoxolones as electrophilic alkyne‐transfer reagents, highly desirable 1,3‐enynes were isolated in excellent yields of up to 98 % with Z stereoselectivity. A broad substrate scope as well as the high synthetic utility
NH<sub>2</sub>-Directed C–H Alkenylation of 2-Vinylanilines with Vinylbenziodoxolones
作者:Andreas Boelke、Lucien D. Caspers、Boris J. Nachtsheim
DOI:10.1021/acs.orglett.7b02630
日期:2017.10.6
directing-group-mediated C–H alkenylation with alkenyl-λ3-iodanes as electrophilic alkene-transfer reagents has been developed. The application of free aromatic amines as challenging but synthetically valuable directing groups in combination with an IrIII catalyst enabled the synthesis of highly desirable 1,3-dienes in excellent yields of up to 98% with high to perfect (Z,E) stereoselectivity. A broad substrate
Synthesis of 1-Amino-2,2,2-trifluoroalkylphosphonates from Alkene-Tethered Trifluoroacetimidoyl Chlorides
作者:José F. Rodríguez、Anji Zhang、Ramon Arora、Mark Lautens
DOI:10.1021/acs.orglett.1c02750
日期:2021.10.1
The reaction of alkene-tethered trifluoroacetimidoylchlorides with trialkylphosphites furnishes 1-amino-2,2,2-trifluoroalkylphosphonates. The products were generated in moderate to good yields, and the scalability of this process was showcased. Partial hydrolysis of the phosphonate moiety was achieved. The cyclization is proposed to occur via formation of an imidoyl phosphonate intermediate that