A New Strategy for the Synthesisof γ-Nitro Alcohols from Aliphatic Nitro Compounds
作者:Sema L. Ioffe、Roman A. Kunetsky、Alexander D. Dilman、Konstantin P. Tsvaygboym、Yury A. Strelenko、Vladimir A. Tartakovsky
DOI:10.1055/s-2003-40203
日期:——
A general method for the synthesis of γ-nitro alcohols 1 via C-C-cross-coupling of nitro compounds 3 with silyl derivatives of nitro compounds 4, deoximination of resulting substrates and selective reduction of carbonyl group of ketones 2 is elaborated.
Synthesis of Isoxazolines from Nitroalkanes
<i>via</i>
a [4+1]‐Annulation Strategy
作者:Pavel Yu. Ushakov、Elizaveta A. Khatuntseva、Yulia V. Nelyubina、Andrey A. Tabolin、Sema L. Ioffe、Alexey Yu. Sukhorukov
DOI:10.1002/adsc.201901000
日期:2019.12.3
using the [4+1]‐annulation of α‐keto‐stabilized sulfur ylides with N,N‐bis(siloxy)enamines derived from aliphatic nitro compounds. The resulting 5‐keto‐substituted isoxazolines were shown to be convenient precursors of polysubstituted 3‐hydroxypyrrolidines via the one‐pot catalytic N−O hydrogenolysis/intramolecular reductive amination sequence. Application of this approach to the formal synthesis of Merck's
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
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 of<i>N</i>,<i>N</i>-Bis(siloxy)enamines. Part 8.A General Method for the Preparation of α-Azido Oximes from Aliphatic Nitro Compounds
作者:Alexey V. Lesiv、Sema L. Ioffe、Alexey Yu. Sukhorokov、Igor V. Bliznets、Yulija A. Khomutova、Yuriy A. Strelenko
DOI:10.1055/s-2005-861836
日期:——
A new convenient procedure for the preparation of a variety of α-hydroxy oximes from available aliphatic nitro compounds via intermediate N,N-bis(siloxy)enamines is presented. The mechanism of the key step, the rearrangement of N,N-bis(siloxy)enamines, is discussed.