Cp*Ir Complex-Catalyzed <i>N</i>-Heterocyclization of Primary Amines with Diols: A New Catalytic System for Environmentally Benign Synthesis of Cyclic Amines
作者:Ken-ichi Fujita、Takeshi Fujii、Ryohei Yamaguchi
DOI:10.1021/ol048619j
日期:2004.9.1
[reaction: see text] A new efficient method for the N-heterocyclization of primaryamines with diols catalyzed by a CpIr complex was developed. A variety of five-, six-, and seven-membered cyclic amines were synthesized in good to excellent yields with the formation of only water as a byproduct. A two-step asymmetric synthesis of (S)-2-phenylpiperidine was also achieved using (R)-1-phenylethylamine
Highly efficient, base-catalysed, intramolecular hydroamination of non-activated olefins
作者:Coralie Quinet、Pierre Jourdain、Christophe Hermans、Ali Ates、Isabelle Lucas、István E. Markó
DOI:10.1016/j.tet.2007.11.066
日期:2008.2
The intramolecularhydroamination of a large variety of non-activated alkenes can be efficiently catalysed by small amounts of lithium bases, providing smoothly and in high yields the corresponding five- and six-membered ring heterocycles. Fused and bridged bicyclic amines, of varying ring sizes, can be readily prepared either by a sequential hydroamination process or by a tandem, double addition reaction
A redox-enabled strategy for intramolecular hydroamination
作者:Meredith A. Allen、Huy M. Ly、Geneviève F. O'Keefe、André M. Beauchemin
DOI:10.1039/d2sc00481j
日期:——
A redox strategy enables hydroaminations: mild conditions allows efficient hydroxylamine formation & cyclization, then B2(OH)4 as reductant also facilitates isolation!
Diastereoselective synthesis of 2,5-dimethylpyrrolidines and 2,6-dimethylpiperidines by reductive amination of 2,5-hexanedione and 2,6-heptanedione with hydride reagents
作者:Carla Boga、Francesco Manescalchi、Diego Savoia
DOI:10.1016/s0040-4020(01)85010-9
日期:1994.4
The reductive amination of 2,5-hexanedione and 2,6-heptanedione with ammonia and primary amines in the presence of hydride reagents afforded 2,5-dimethylpyrrolidines and 2,6-dimethylpiperidines with variable diastereoselectivity, as the cis/trans ratio was affected by the size of the ring formed and the steric and electronic properties of the nitrogen substituent. Increasing the bulkiness of the nitrogen substituent, the cis pyrrolidines and the bans-piperidines were obtained with enhanced selectivity.
IRIDIUM-CATALYZED N-HETEROCYCLIZATION OF PRIMARY AMINES WITH DIOLS: N-BENZYLPIPERIDINE
作者:Fujita, Ken-ichi、Enoki, Youichiro、Yamaguchi, Ryohei、Moura-Letts, Gustavo、Curran, Dennis P.