Practical Singly and Doubly Electrophilic Aminating Agents: A New, More Sustainable Platform for Carbon–Nitrogen Bond Formation
作者:Padmanabha V. Kattamuri、Jun Yin、Surached Siriwongsup、Doo-Hyun Kwon、Daniel H. Ess、Qun Li、Guigen Li、Muhammed Yousufuddin、Paul F. Richardson、Scott C. Sutton、László Kürti
DOI:10.1021/jacs.7b05279
日期:2017.8.16
symmetrical and unsymmetrical diaryl-, arylalkyl-, and dialkylamines that relies on the facile single or double addition of readily available C-nucleophiles to the nitrogen atom of bench-stable electrophilic aminating agents. Practical single and double polarity reversal (i.e., umpolung) of the nitrogen atom is achieved using sterically and electronically tunable ketomalonate-derived imines and oximes.
Iron‐Catalyzed Reductive Cyclization by Hydromagnesiation: A Modular Strategy Towards
<i>N</i>
‐Heterocycles
作者:Joachim Loup、Egor M. Larin、Mark Lautens
DOI:10.1002/anie.202106996
日期:2021.10.4
N-heterocycles, through the use of ortho-vinylanilides, is reported. The reaction is catalyzed by an inexpensive and bench-stable iron complex and generally occurs at ambient temperature. The transformation likely proceeds through hydromagnesiation of the vinyl group, and trapping of the in situ generated benzylic anion by an intramolecular electrophile to form the heterocycle. This iron-catalyzed strategy
The synthesis of BN-embedded tetraphenes and their photophysical properties
作者:Huanan Huang、Zexiong Pan、Chunming Cui
DOI:10.1039/c6cc00161k
日期:——
A series of intensely blue fluorescent BN-embedded tetraphene derivatives have been synthesized by the catalytic cyclization of BN-naphthalenes with alkynes.
A Convergent, Modular Approach to Functionalized 2,1-Borazaronaphthalenes from 2-Aminostyrenes and Potassium Organotrifluoroborates
作者:Steven R. Wisniewski、Courtney L. Guenther、O. Andreea Argintaru、Gary A. Molander
DOI:10.1021/jo402616w
日期:2014.1.3
Azaborines are an important class of compounds with applications in both medicinal chemistry and materials science. The first borazaronaphthalene, 2-chloro-2,1-borazaronaphthalene, was reported in 1959; however, access to more highly functionalized substructures has been limited because of the harsh reaction conditions required to displace the chloride on boron. A convergent approach has been developed to synthesize disubstituted 2,1-borazaronaphthalenes from N-substituted 2-aminostyrenes and potassium organotrifluoroborates, where the potassium organotrifluoroborate is converted to the active R-BX2 species (X = Cl or F) in situ by addition of a fluorophile. Starting from aryl-, heteroaryl-, alkynyl-, alkenyl-, and alkyltrifluoroborates, a library of highly functionalized 2,1-borazaronaphthalenes were synthesized in one step under mild, transition-metal-free conditions.