4733-73-7Relevant academic research and scientific papers
Asymmetric synthesis of α-alkylated aldehydes using terminal epoxide-derived chiral enamines
Hodgson, David M.,Kaka, Naeem S.
supporting information; experimental part, p. 9958 - 9960 (2009/06/30)
(Chemical Equation Presented) Effective discrimination: Efficient lithium amide-induced terminal epoxide-enamine transformation provides the first enamines capable of generating α-alkylated aldehydes with high asymmetric induction by intermolecular nucleophilic substitution (see scheme).
MECHANISMS OF FREE-RADICAL REACTIONS. XXV. REACTIVITY OF N-CHLORO-2,2,6,6-TETRAMETHYLPIPERIDINE IN FREE-RADICAL CHLORINATION OF ALIPHATIC COMPOUNDS
Dneprovskii, A. S.,Mil'tsov, S. A.
, p. 1836 - 1840 (2007/10/02)
The chlorination of 2,3-dimethylbutane and cyclohexane by N-chloropiperidine and N-chloro-2,2,6,6-tetramethylpiperidine was studied.The rate of abstraction of the hydrogen atom from various positions is determined mainly by the dissociation energies of the respective C-H bonds.The higher reactivity of the R2CH2 group compared with R3CH for the last reagent is due to the significant sensitivity of the radical to steric factors.In the absence of highly reactive substrates N-chloro-2,2,6,6-tetramethylpiperidine dissociates through β-fragmentation of the radical-cation.
