alpha-Amino nitriles containing a primary amino group undergo transamination with aliphatic and aromatic amines under mild conditions with high yields. A probable reaction mechanism involving intermediate elimination of cyanide ion has been proposed.
Synthesis and evaluation of conformationally restricted N-[2-(3,4-dichlorophenyl)ethyl]-N-methyl-2-(1-pyrrolidinyl)ethylamines at .sigma. receptors. 2. Piperazines, bicyclic amines, bridged bicyclic amines, and miscellaneous compounds
作者:Brian R. de Costa、Xiaoshu He、Joannes T. M. Linders、Celia Dominguez、Zi Qiang Gu、Wanda Williams、Wayne Bowen
DOI:10.1021/jm00068a007
日期:1993.8
4-dichlorophenyl)ethyl]-1,4-diazabicyclo[3.2.2]nonane (16)] show very weak sigma interaction. Comparison of the binding data of different N-substituted homologues of 1 with those of the 1-[2-(3,4-dichlorophenyl)ethyl]-4-alkylpiperazines suggests that the two nitrogen atoms of 1 are working in opposition to one another in terms of their sensitivity to steric bulk. The high binding affinity of the 1,4-diazabicyclo[4
Hypervalent iodine oxidation of amines using iodosobenzene: Synthesis of nitriles, ketones and lactams
作者:Robert M Moriarty、Radhe K Vaid、Michael P Duncan、Masahito Ochiai、Minako Inenaga、Yoshimitsu Nagao*
DOI:10.1016/s0040-4039(00)88473-7
日期:1988.1
Primary aliphatic amines on oxidation with iodosobenzene in CH2Cl2 or H2O yield the corresponding nitriles, while primary cycloalkylamines give the corresponding cyclic ketones. Lactams are obtained by the oxidation of cyclic amines. (S)(−) Nicotine () is oxidized to ()-cotinine (). The intermediary imine involved in these processes was trapped in the case of piperidine as the α-aminonitrile.
(±)-Trans-Ph/Et and (±)-cis-Ph/Et 1-(2-ethyl-1-phenylcyclohexyl)piperidine were synthesized from 2-ethylcyclohexanone. In contrast to the corresponding trans-substituted 2-methyl compound which is 5x more potent than PCP, the trans-2-ethyl derivative has a 75x lower affinity for the PCP binding site. The cis-2-ethyl isomer is inactive like the cis-2-methyl derivative. (±)-1-(1- Phenylcyclohexyl)-2-methylpiperidine is almost as active as the parent PCP. Reduction of the aromatic ring or quaternization of the piperidine in PCP reduces the affinity for the PCP site.
An environmentally friendly and highly active mesoporous Co(II) complex on mesoporous SBA-15 material could be used as an easily recoverable catalyst for the synthesis of α-aminonitriles from a wide range of aldehydes/ketones and primary or secondary amines with good to excellent conversions yields at room temperature under solventless conditions. The catalyst can be recovered by simple filtration and could be reused at least 10 times without loss of catalytic activity.
Heterogeneously catalysed Strecker-type reactions using supported Co(ii) catalysts: microwave vs. conventional heating
作者:Fatemeh Rajabi、Saghar Nourian、Sara Ghiassian、Alina M. Balu、Mohammad Reza Saidi、Juan Carlos Serrano-Ruiz、Rafael Luque
DOI:10.1039/c1gc15741h
日期:——
α-aminonitriles could be efficiently prepared from various aldehydes/ketones and primary or secondary amines using a highly active and stable Co(II) complex supported on different mesoporous supports at both room temperature and low temperature microwave irradiation undersolventlessconditions. Catalysts were also highly reusableunder the investigated reactionconditions and could be reused at least 10 times