作者:Sheng-Peng Jiang、Xiao-Yang Dong、Qiang-Shuai Gu、Liu Ye、Zhong-Liang Li、Xin-Yuan Liu
DOI:10.1021/jacs.0c09125
日期:2020.11.18
A copper-catalyzed enantioconvergent Suzuki-Miyaura C(sp3)-C(sp2) cross-coupling of various racemic alkyl halides with organoboronate esters has been established in high enantioselectivity. Critical to the success is the use of a chiral cinchona alkaloid-derived N,N,P-ligand for not only enhancing the reducing capability of copper catalyst to favor a stereoablative radical pathway over a stereospecific
Diastereo‐ and Enantioselective 1,4‐Difunctionalization of Borylenynes by Catalytic Conjunctive Cross‐Coupling
作者:Chunyin Law、Elton Kativhu、Johnny Wang、James P. Morken
DOI:10.1002/anie.202001580
日期:2020.6.22
Enantioselective conjunctive cross‐coupling of enyne‐derived boronate complexes occurs with 1,4 addition of the electrophile and migrating group across the π system. This reaction pathway furnishes α‐boryl allenes as the reaction product. In the presence of a chiral catalyst, both the central and axial chirality of the product can be controlled during product formation.
Alkyl Group Migration in Ni-Catalyzed Conjunctive Coupling with C(sp<sup>3</sup>) Electrophiles: Reaction Development and Application to Targets of Interest
作者:Seung Moh Koo、Alex J. Vendola、Sarah Noemi Momm、James P. Morken
DOI:10.1021/acs.orglett.9b04453
日期:2020.1.17
cross-coupling reaction is developed that allows the construction of chiral organoboronic esters from alkylboron ate complexes and alkyl iodide electrophiles. The process occurs most efficiently with a Ni/Pybox-comprised catalyst and with an acenapthoquinone-derived boron ligand. Because of the broad functional group tolerance of this reaction, it can be a versatile tool for organicsynthesis. Applications
Enantioselective Synthesis of Tertiary β‐Boryl Amides by Conjunctive Cross‐Coupling of Alkenyl Boronates and Carbamoyl Chlorides
作者:Christopher A. Wilhelmsen、Xuntong Zhang、Jesse A. Myhill、James P. Morken
DOI:10.1002/anie.202116784
日期:2022.4.4
Versatile tertiary β-boryl amides are prepared by conjunctivecross-coupling of α-substituted alkenyl boron “ate” complexes and carbamoyl chloride electrophiles. This reaction gives morpholine amides, which are easily converted to an array of useful building blocks.
Asymmetric Synthesis of β-Aminoboronates via Copper-Catalyzed Reductive Coupling of Vinyl Boronates with Imines
作者:Jing He、Cham Bi Seo、Wan Seok Yoon、Jaesook Yun
DOI:10.1021/acs.orglett.3c01949
日期:2023.7.28
We report a copper-catalyzed asymmetricreductive coupling of vinyl boronates with imines, which directly access enantiomerically enriched β-aminoalkylboronates. Stereoselective addition of the in situ generated chiral α-borylalkyl copper to N-phosphinoyl imines provided target products in good yields with high diastereo- and enantioselectivity. Vinyl boronate with methylated acenaphthoquinone as a