申请人:The Board of Trustees of the University of Illinois
公开号:US20180362513A1
公开(公告)日:2018-12-20
Described herein is the development of an arenophile-mediated, nickel-catalyzed dearomative trans-1,2-carboamination protocol. A range of readily available aromatic compounds was converted to the corresponding dienes using Grignard reagents as nucleophiles. This strategy provided products with exclusive trans-selectivity and high enantioselectivity was observed in case of benzene and naphthalene. The utility of this methodology was showcased by controlled and stereoselective preparation of small, functionalized molecules.
A concise synthesis of (+)-pancratistatin and (+)-7-deoxypancratistatin from benzene using an enantioselective, dearomative carboamination strategy has been achieved. This approach, in combination with the judicious choice of subsequent olefin-type difunctionalization reactions, permits rapid and controlled access to a hexasubstituted core. Finally, minimal use of intermediary steps as well as direct, late stage C-7 hydroxylation provides both natural products in six and seven operations.
作者:Lucas W. Hernandez、Ulrich Klöckner、Jola Pospech、Lilian Hauss、David Sarlah
DOI:10.1021/jacs.8b01726
日期:2018.4.4
We describe the development of an arenophile-mediated, nickel-catalyzed dearomative trans-1,2-carboamination protocol. A range of readily available aromatic compounds was converted to the corresponding dienes using Grignard reagents as nucleophiles. This strategy provided products with exclusive trans-selectivity and high enantioselectivity was observed in case of benzene and naphthalene. The utility
nonactivated arenes and amines. This one-pot method utilizes arene-arenophile para-cycloadducts, formed via visible-light-mediated [4+2]-photocycloaddition that undergoes formal allylic substitution with amine nucleophiles under Pd-catalysis. The products are obtained with exclusive syn-1,4-selectivity; the method permits enantioselective desymmetrization of naphthalene, as well as elaborations of amine-containing
作者:Christopher W. Davis、Yanrong Li、Yu Zhang、Zohaib Siddiqi、Peng Liu、David Sarlah
DOI:10.1021/acscatal.4c02656
日期:2024.7.5
We have achieved the arenophile-mediated, copper-catalyzed dearomative trans-1,2-carboamination of nonactivated arenes with alkyl organometallic nucleophiles. This simple and practical procedure was used to prepare diverse, stereochemically rich alkylated cyclohexadienes from readily available arenes. Synthetic utility was demonstrated through the rapid preparation of complex small molecules difficult