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.
Novel Convenient Method for the Synthesis of N,N-Bis(trimethylsilyloxy)enamines
作者:A. D. Dilman、A. A. Tishkov、I. M. Lyapkalo、S. L. Ioffe、Yu. A. Strelenko、V. A. Tartakovsky
DOI:10.1055/s-1998-2019
日期:1998.2
Both primary and secondary aliphatic nitro compounds 1 were found to react with two equivalents of bromotrimethylsilane in the presence of triethylamine followed by aqueous workup to give appropriate N,N-bis(trimethylsilyloxy)enamines 3 in good isolated yields. Products 3, starting from some secondary and/or sterically hindered compounds 1, are synthesized from the corresponding silyl nitronates 2.
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
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.