Herein, we report the first Ni-catalyzed enantioselective deaminative alkylation of amino acid and peptide derivatives with unactivated olefins. Key for success was the discovery of a new sterically encumbered bis(oxazoline) ligand backbone, thus offering a de novo technology for accessing enantioenriched sp 3 −sp 3 linkages via sp 3 C−N functionalization. Our protocol is distinguished by its broad scope and generality across a wide number of counterparts, even in the context of late-stage functionalization. In addition, an enantioselective deaminative remote hydroalkylation reaction of unactivated internal olefins is within reach, thus providing a useful entry point for forging enantioenriched sp 3 −sp 3 centers at remote sp 3 C−H sites.
The analogous three‐component synthesis strategy for substituted 1,2,4‐oxadiazole and quinazoline derivatives from readily available benzaldehyde, benzylamine and hydroxylamine or aniline has been developed. Both the cascade reaction sequences involves nucleophilic addition of C−N bond, introduction a halogen donor, nucleophilic substitution and Cu(II)‐catalyzed aerobic oxidation. This synthesis methodology demonstrated good yields, broad substrate scope and oxygen as a green oxidant. Thus, this synthesis protocol provides strategies for the construction of substituted 1,2,4‐oxadiazole and quinazolines from readily and simple starting materials.
A one-pot
and step economic reaction involving Rh(III)-catalyzed
C–H thiolation and relay Cu(II)-catalyzed C–N amination
of acetanilide and 2-bromothiophenol is reported here, with several
valuable phenothiazine products obtained. This synthesis protocol
proceeds from easily starting materials, demonstrating high atom economy,
broad substrate scope, and good yield. Furthermore, the directing
group can be easily eliminated, and chlorpromazine is provided in
a large scale; thus this synthesis protocol could be utilized to construct
phenothiazine scaffolds.
We established an efficient and sustainable rhodium(III)-catalyzed and ionic liquid-mediated CÀ S and CÀ Se formation from readily available starting material acetanilide with diaryl disulfides and diaryl diselenides. The CÀ H activation proceeds in ionic liquid without extra silver salt as additive, and the catalytic media can be reused for several times to accomplish the catalysts sustainable utilization. Furthermore, this synthesis protocol is suitable for a wide functional group compatibility, and the directing group can be easily removed. Most importantly it can be developed as a facile access to phenothiazine scaffold with potent biological activities, thus this strategy can be broadly applied to organic synthesis and medicinal chemistry.
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