Copper-Catalyzed Direct Oxidative α-Arylation of Pyrrolidine with Phenols and Naphtols
作者:Phideline Gerard、Gwilherm Evano
DOI:10.2174/1570178614666171120164418
日期:2018.4.12
An efficient procedure for the direct arylation of pyrrolidine with phenols and naphtols is
reported. Upon reaction with catalytic amounts of a binuclear copper(II)-7-azaindole complex under an
atmosphere of oxygen, pyrrolidine is smoothly oxidized to the corresponding imine which can be
trapped in situ by a series of phenols and naphtols in fair to good yields. This copper-catalyzed direct
oxidative arylation of pyrrolidine offers an efficient entry to α-aryl-pyrrolidines in a single step and
without the need for protecting or directing groups.
A large library of aminocycloalkylphenols and -naphthols is obtained by the Betti reaction between activated phenols and naphthols and five- and six-membered cyclic imines. Due to the formation of an intramolecular hydrogen bond in the transition state, the attack takes place regioselectively at the position adjacent to the hydroxy group of the aromatic compounds. X-ray crystallography and chirooptical
通过活化酚和萘酚与五元和六元环亚胺之间的 Betti 反应,获得了大量的氨基环烷基苯酚和萘酚。由于过渡态分子内氢键的形成,攻击发生在与芳族化合物羟基相邻的位置上。在用 (R,R)-酒石酸拆分相应的外消旋物后,使用 X 射线晶体学和手光学方法(电子圆二色性)来确定所获得的两种氨基烷基萘酚的绝对构型。此外,一些氨基烷基萘酚和-苯酚在氮原子上被烷基化,以良好的收率获得N-甲基化产物。
Design, Synthesis, Characterization, and Polymerization of Fused-Ring Naphthoxazine Resins
作者:Carlos R. Arza、Pablo Froimowicz、Lu Han、Robert Graf、Hatsuo Ishida
DOI:10.1021/acs.macromol.7b00932
日期:2017.12.12
Fused-ring naphthoxazine monomers are synthesized from 1-naphthols and cycloimines derived from piperidine and pyrrolidine. Their polymerization has been confirmed by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and Fourier transform infrared spectroscopy (FT-IR) as well as by solution and solid-state 1H and 13C nuclear magnetic resonance spectroscopy (NMR). A polymerization