A one-pot electrophilic cyanation–functionalization strategy for the synthesis of disubstituted malononitriles
作者:L. Reginald Mills、Sophie A.L. Rousseaux
DOI:10.1016/j.tet.2019.05.004
日期:2019.8
Malononitriles are valuable synthetic intermediates for many applications, including the synthesis of herbicides and other biologically active molecules, and the synthesis of chiral ligands for asymmetric catalysis. This article describes the development of a procedure for the conversion of primary nitriles to malononitriles using dimethylmalononitrile, a commercial, non-toxic, carbon-bound source
Potassium tert-Butoxide Mediated Arylation of 2-Substituted Malononitriles Using Diaryliodonium Salts
作者:Jianwei Han、Limin Wang、Xiaofei Qian、Bowen Xu
DOI:10.1055/s-0036-1589061
日期:2017.10
Direct arylation of 2-substituted malononitriles using diaryliodonium salts without involving transition-metal catalysts was developed. By using potassiumtert-butoxide as a promoter, the desired 2-substituated α-arylmalononitriles derivatives were synthesized in good to excellent yields of 55–96%. This synthetic method provided an efficient way to prepare a variety of 2-substituted arylmalononitriles
Decyanation–(hetero)arylation of malononitriles to access α-(hetero)arylnitriles
作者:L. Reginald Mills、Purvish Patel、Sophie A. L. Rousseaux
DOI:10.1039/d2ob00236a
日期:——
Quaternary α-(hetero)arylnitriles are desirable biologically relevant products, however the existing methods for their synthesis can be unselective or require the use of undesirable reagents, such as cyanide salts. Herein we report a one-pot method for transnitrilation-mediated decyanation–metalation of disubstituted malononitriles, followed by treatment with (hetero)aryl electrophiles to access quaternary
Ni-Catalyzed Kumada–Corriu Cross-Coupling Reactions of Tertiary Grignard Reagents and Bromostyrenes
作者:Kaidi Li、Bing Zu、Clément Mazet
DOI:10.1021/acs.orglett.4c02185
日期:2024.7.19
congested quaternary centers is highly sought-after. Herein, we report a method for the cross-coupling of C(sp3) tertiary Grignard reagents with C(sp2) styrenyl bromides using readily available nickel precatalysts. We identified conditions that afford the products in practical yield for several combinations of electrophiles and nucleophiles, including sensitive α-magnesiated Grignard reagents. Dependent