A Versatile Cyclodehydration Reaction for the Synthesis of Isoquinoline and β-Carboline Derivatives
作者:Mohammad Movassaghi、Matthew D. Hill
DOI:10.1021/ol801264u
日期:2008.8.21
beta-carboline derivatives via mild electrophilic amide activation, with trifluoromethanesulfonic anhydride in the presence of 2-chloropyridine, is described. Low-temperature amide activation followed by cyclodehydration upon warming provides the desired products with short overall reaction times. The successful use of nonactivated and halogenated phenethylene derived amides, N-vinyl amides, and optically active
Transition-metal-free, visible-light induced cyclization of arylsulfonyl chlorides with 2-isocyanobiphenyls to produce phenanthridines
作者:Lijun Gu、Cheng Jin、Jiyan Liu、Hongyan Ding、Baomin Fan
DOI:10.1039/c4cc01487a
日期:——
A visible-light promoted transformation of 2-isocyanobiphenyls and arylsulfonyl chlorides for the synthesis of phenanthridines under oxidant-free and transition-metal-free conditions was described.
2-异氰基联苯和芳基磺酰氯在无氧化剂和过渡金属的条件下,经可见光促进转化合成菲啰啉。
Copper-Catalyzed Synthesis of Phenanthridine Derivatives under an Oxygen Atmosphere Starting from Biaryl-2-carbonitriles and Grignard Reagents
作者:Line Zhang、Gim Yean Ang、Shunsuke Chiba
DOI:10.1021/ol101490n
日期:2010.8.20
A copper-catalyzedsynthesis of phenanthridine derivatives was developed startingfrom biaryl-2-carbonitriles and Grignard reagents. The present transformation is carried out by a sequence of nucleophilic addition of Grignard reagents to biaryl-2-carbonitriles to form N-H imines and their Cu-catalyzed C−N bond formation on the aromatic C−H bond, where molecular oxygen is a prerequisite to achieve the
A One-Pot Access to 6-Substituted Phenanthridines from Fluoroarenes and Nitriles via 1,2-Arynes
作者:Jan Pawlas、Mikael Begtrup
DOI:10.1021/ol026197c
日期:2002.8.1
[reaction: see text] A one-pot, t-BuLi-induced synthesis of 6-substitutedphenanthridines from fluoroarenes and nitriles via 1,2-arynes is reported. Aryl- and hetaryl nitriles, cyanamides, and trimethylacetonitrile gave phenanthridineproducts. The method was extended to provide bisphenanthridine 10 by a one-pot bis-cyclization, using 1,3-dicyanobenzene and PhF in 1:5 ratio. Reaction of 1-fluoronaphthalene
Coupling N–H Deprotonation, C–H Activation, and Oxidation: Metal-Free C(sp<sup>3</sup>)–H Aminations with Unprotected Anilines
作者:Christopher J. Evoniuk、Gabriel dos Passos Gomes、Sean P. Hill、Satoshi Fujita、Kenneth Hanson、Igor V. Alabugin
DOI:10.1021/jacs.7b07519
日期:2017.11.15
An intramolecular oxidativeC(sp3)–H amination from unprotected anilines and C(sp3)–H bonds readily occurs under mild conditions using t-BuOK, molecular oxygen and N,N-dimethylformamide (DMF). Success of this process, which requires mildly acidic N–H bonds and an activated C(sp3)–H bond (BDE < 85 kcal/mol), stems from synergy between basic, radical, and oxidizing species working together to promote