I<sub>2</sub>-Mediated oxidative bicyclization of 4-pentenamines to prolinol carbamates with CO<sub>2</sub> incorporating oxyamination of the CC bond
作者:Sheng Wang、Xiaowei Zhang、Chengyao Cao、Chao Chen、Chanjuan Xi
DOI:10.1039/c7gc01992k
日期:——
oxyamination reaction of alkenes with ambient CO2 is reported. In the presence of I2 and DBU, CO2 is applied in situ as a protectinggroup to regulate the nucleophilicity of the aminogroup and facilitate the bicyclization of 4-pentenamines with high chemoselectivity. Moreover, this reaction provided a feasible approach to prepare prolinol carbamates with good tolerance of functional groups and high efficiency
Pd-Catalyzed Intramolecular Aminoalkylation of Unactivated Alkenes: Access to Diverse <i>N</i>-Heterocycles
作者:Liu Ye、Kai-Yip Lo、Qiangshuai Gu、Dan Yang
DOI:10.1021/acs.orglett.6b03295
日期:2017.1.20
A highly efficient palladium-catalyzedintramolecular aminoalkylation of unactivatedalkenes in the absence of an external ligand and oxidant is described. New C–N and C(sp3)–C(sp3) bonds are formed simultaneously. This general transformation allows for construction of diverse N-heterocycles. Mechanistic studies show that the process may involve a four-membered Pd(alkyl)amido intermediate.
Palladium(II)‐Catalyzed Aminotrifluoromethoxylation of Alkenes: Mechanistic Insight into the Effect of
<i>N</i>
‐Protecting Groups
作者:Chaohuang Chen、Chuanqi Hou、Pinhong Chen、Guosheng Liu
DOI:10.1002/cjoc.201900516
日期:2020.4
An efficientpalladium‐catalyzed regioselective 5‐exo aminotrifluoromethoxylation of alkenes has been established herein, which provides a practical route towards the synthesis of OCF3‐containing pyrrolidines. tert‐Butyloxycarbonyl (Boc) as an amino protectinggroup plays a significant role in both the chemo‐ and regioselectivities. In addition, preliminary mechanistic studies reveal that the amino
Highly Active and Diastereoselective N,O- and N,N-Yttrium Complexes for Intramolecular Hydroamination
作者:Frank Lauterwasser、Paul G. Hayes、Warren E. Piers、Laurel L. Schafer、Stefan Bräse
DOI:10.1002/adsc.201000892
日期:2011.5
The intramolecularhydroamination of aminoalkynes and unactivated aminoalkenes catalyzed by yttrium N,O‐ and N,N‐complexes has been investigated. The N,N‐yttrium complexes are highlyactive, catalyzing the conversion of a wide range of terminal aminoalkenes at room temperature, and internal aminoalkenes at elevated temperature, to yield pyrrolidine and piperidine products in high yields. A high diastereoselectivity
Gold Nanoclusters as a Catalyst for Intramolecular Addition of Primary Amines to Unactivated Alkenes under Aerobic Conditions
作者:Hiroaki Kitahara、Hidehiro Sakurai
DOI:10.1246/cl.2010.46
日期:2010.1.5
Gold nanoclusters stabilized by the poly(N-vinyl-2-pyrrolidone) hydrophilic polymer (Au:PVP) catalyzed the intramolecular cycloaddition of primary amines to unactivated alkenes in the presence of formic acid derivatives. The reaction proceeded under neutral to slightly acidic conditions in air.