Synthesis of α-Thiooximes by Addition of Thiols to N,N-Bis(oxy)-enamines: A Comparative Study of S-, N-, and O-Nucleophiles in Michael Reaction with Nitrosoalkene Species
Nucleophilicaddition of thiols to N , N -bis(oxy)enamines (nitrosoalkene acetals) produce valuable α-thiooximes in a highly efficient manner. The reaction was found to be solvent-dependent, likely because of distinct mechanisms operating in nonpolar and basic solvents (involving either Bronsted acid or Lewis base catalysis). By performing a series of competition experiments, the relative reactivity
A General Metal-Assisted Synthesis of α-Halo Oxime Ethers from Nitronates and Nitro Compounds
作者:Alexey Yu. Sukhorukov、Maria A. Kapatsyna、Tammy Lim Ting Yi、Hyeong Ryool Park、Yana A. Naumovich、Petr A. Zhmurov、Yulia A. Khomutova、Sema L. Ioffe、Vladimir A. Tartakovsky
DOI:10.1002/ejoc.201403083
日期:2014.12
α-halo oximeethersfrom readily accessible nitronates and nitro compounds via bis(oxy)enamines is reported. A key step of the strategy involves the unprecedented reaction of bis(oxy)enamines with a metal (Co, Zn, Mg, Mn) halide that acts as both a promoter and halide (Br, I, Cl) source. A variety of cyclic and acyclic ethers of α-halo oximes, including previously unavailable trimethylsilyl ethers of α-iodo
Stereoselective approach to conjugated enone oximes from aliphatic nitro compounds and sulfur ylides
作者:Rauf T. Akhmirov、Sema L. Ioffe、Alexey Yu. Sukhorukov
DOI:10.1016/j.mencom.2021.09.031
日期:2021.9
A novel approach to conjugated enone oximes from aliphatic nitro compounds deals with double silylation of N,N-bis(silyloxy) enamines followed by a stereoselective reaction with an ester-stabilized sulfur ylide. The proposed mechanism involves the generation of labile nitrosoalkenes as intermediates, which react with the sulfur ylide to give target enone oximes.
The chemistry ofN,N-bis (trialkylsilyloxy) enamines
作者:L. M. Makarenkova、I. V. Bliznets、S. L. Ioffe、Yu. A. Strelenko、V. A. Tartakovsky
DOI:10.1007/bf02495772
日期:2000.7
The reactions of primary amines withN,N-bis(trimethylsilyloxy) enamines can give products of both mono-and bis-α-oximinoalkylation of primary amines. The steric restrictions in both reactants substantially retard bis-α-oximinoalkylation. A general method for the synthesis of α-amino-substituted oximes from primary amines and bis-silyl derivatives of aliphatic nitro compounds was developed.
Michael Addition of P-Nucleophiles to Conjugated Nitrosoalkenes
作者:Yana A. Naumovich、Sema L. Ioffe、Alexey Yu. Sukhorukov
DOI:10.1021/acs.joc.9b00924
日期:2019.6.7
oxides, phosphine–borane complexes, and phosphonium salts) was developed. The strategy exploits hitherto unknown Michaeladdition of PH-containing compounds (diphenylphosphine oxide, diisopropyl phosphite, phosphine–borane complexes, and triphenylphosphonium bromide) to unstable conjugated nitrosoalkenes, which are generated in situ from corresponding nitrosoacetals. The resulting α-phosphorus-substituted