模型化合物4-(2-甲酰基苄基)-2-苯基萘并[1,8- bc ]呋喃-5-酮(I; R = CHO)已转化为相应的N-苯基-6aβ,12β-环氧亚氨基萘基[1]通过用N-苯基羟胺处理,得到12,bc ]呋喃-6-一(II; R = H)。将该中间体转化为6β-乙酰氧基-12β-苯胺基-6aα,7,12,12aα-四氢-1-苯基-6 H-萘基[ 1,12- bc ]呋喃(X; R 1 = OAc,R 2 = H,R 3= H)被描述。一种转换某些N的方法已经开发了将-芳基烷基胺转变成相应的亚胺,并详细说明了这种氧化在合成序列中的应用。最后,描述了环化方法成功地用于生产在环A中带有取代基的四环物质的成功应用。
A novel Rh(iii)-catalyzed relay cross-coupling cascade between arylketoimines and diazoesters is described. This transformation provides a concise access to unique π-conjugated 1-azaphenalenes (1-APLEs) via a double aryl Csp2–H bond carbenoid functionalization process.
l-Pipecolinic acid derived Lewis base organocatalyst for asymmetric reduction of N-aryl imines by trichlorosilane: effects of the side amide group on catalytic performances
作者:Zhouyu Wang、Chao Wang、Li Zhou、Jian Sun
DOI:10.1039/c2ob26772a
日期:——
A series of N-formamides derived from pipecolinic acid have been synthesized and tested as Lewisbase catalysts for the enantioselective reduction of N-aryl imines by trichlorosilane. Through the investigation of the structure–efficacy relationship between the side amide group and catalytic performance, several highly effective catalysts were discovered. In particular, arylamido-type catalyst 5i and
NHC-carbene cyclopentadienyl iron based catalyst for a general and efficient hydrosilylation of imines
作者:Luis C. Misal Castro、Jean-Baptiste Sortais、Christophe Darcel
DOI:10.1039/c1cc14403k
日期:——
A general and efficient hydrosilylation of imines catalysed by a well defined NHC-carbene cyclopentadienyl iron complex has been developed. Both aldimines and ketimines are converted to the corresponding amines under mild conditions, and under visible light activation.
A Mild Dihydrobenzooxaphosphole Oxazoline/Iridium Catalytic System for Asymmetric Hydrogenation of Unfunctionalized Dialins
作者:Bo Qu、Lalith P. Samankumara、Shengli Ma、Keith R. Fandrick、Jean-Nicolas Desrosiers、Sonia Rodriguez、Zhibin Li、Nizar Haddad、Zhengxu S. Han、Keith McKellop、Scott Pennino、Nelu Grinberg、Nina C. Gonnella、Jinhua J. Song、Chris H. Senanayake
DOI:10.1002/anie.201408929
日期:2014.12.22
Air‐stable P‐chiral dihydrobenzooxaphosphole oxazoline ligands were designed and synthesized. When they were used in the iridium‐catalyzed asymmetrichydrogenation of unfunctionalized 1‐aryl‐3,4‐dihydronaphthalenes under one atmosphere pressure of H2, up to 99:1 e.r. was obtained. High enantioselectivities were also observed in the reduction of the exocyclic imine derivatives of 1‐tetralones.
Highly Enantioselective Iridium-Catalyzed Hydrogenation of Trisubstituted Olefins, α,β-Unsaturated Ketones and Imines with Chiral Benzylic Substituted P,N Ligands
作者:Wei-Jing Lu、Yun-Wei Chen、Xue-Long Hou
DOI:10.1002/adsc.200900618
日期:2010.1.4
The benzylic substituted P,N ligands, diphosphinobenzyloxazolines, showed their high catalytic activity as well as asymmetric induction in the iridium‐catalyzed asymmetric hydrogenation of unfunctionalized alkenes, α,β‐unsaturated esters, allyl alcohols, α,β‐unsaturated ketones, and imines, providing the corresponding chiral products in high ee with high conversion.