Reactions of N,N-bis(siloxy)enamines with trimethylsilyl cyanide: aliphatic nitro compounds as convenient precursors of 5-aminoisoxazoles
摘要:
A convenient procedure was developed for the synthesis of 5-aminoisoxazoles by the consecutive double silylation and cyanation of aliphatic nitro compounds.
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
In Situ Generated Magnesium Cyanide as an Efficient Reagent for Nucleophilic Cyanation of Nitrosoalkenes and Parent Nitronates
作者:Pavel Yu. Ushakov、Andrey A. Tabolin、Sema L. Ioffe、Alexey Yu. Sukhorukov
DOI:10.1002/ejoc.201801761
日期:2019.3.7
In situ generated magnesium cyanide is a convenient, readily available, non‐volatile and organic‐soluble reagent for hydrocyanation reactions. Efficient nucleophilic cyanation of π‐electrophiles such as nitronates, conjugated nitrosoalkenes, imines, α,β‐unsaturated ketones, methylenemalonates and azoalkenes was demonstrated.
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
Reaction of N,N-Dioxyenamines with Anhydrides of Carboxylic and Sulfonic Acids; A New Method for the Synthesis of α-Hydroxyoxime Derivatives
作者:Alexey Lesiv、Andrey Tabolin、Sema Ioffe
DOI:10.1055/s-0029-1216907
日期:2009.9
The reactions of N,N-dioxyenamines with carboxylic and sulfonic acid anhydrides were investigated. A newmethod for the synthesis of α-hydroxyoxime derivatives via the reaction of N,N-dioxyenamines with trifluoroacetic anhydride is described. 1,2-oxazine - trifluoroacetic anhydride - hydroxyoxime - enamine - rearrangement
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.