A nickel-catalyzed, enantioselective, three-component fluoroalkylarylation of unactivated alkenes with aryl halides and perfluoroalkyl iodides has been described. This cross-electrophile coupling protocol utilizes a chiral nickel/BiOx system as well as a pendant chelating group to facilitate the challenging three-component, asymmetric difunctionalization of unactivated alkenes, providing direct access
A five-step assembly of silicon-protected dipeptide mimics fromcommerciallyavailable reagents is described. This methodology makes silanediol protease inhibitors readily available for the firsttime. The sequence features asymmetric hydrosilylation, a novel reduction of a silyl ether to a silyllithium reagent, and addition of this dianion to a sulfinimine, to produce the complete inhibitor skeleton
Asymmetric [3+2] Annulation Approach to 3-Pyrrolines: Concise Total Syntheses of (−)-Supinidine, (−)-Isoretronecanol, and (+)-Elacomine
作者:Isaac Chogii、Jon T. Njardarson
DOI:10.1002/anie.201506559
日期:2015.11.9
short asymmetric total syntheses of (−)‐supinidine, (−)‐isoretronecanol, and (+)‐elacomine. This novel annulation approach also works for an aldehyde, thus providing access to a 2,5‐dihydrofuran product in a single step from simple precursors. By modifying the structure of the carbanion nucleophile, an asymmetric vinylogous aza‐Darzens reaction can be realized.
The present invention relates to various organic reactions including a method for producing heterocyclic compounds using a [3+2] annulation; a method for producing fluorinated heteroaromatic compounds; and a method for alkylating a meta-position of a phenolic compound. In one aspect of the invention, a method is provided for producing a 3-pyrroline compound by reacting an chiral imine with an enoate containing a leaving group at the gamma position.