Reductive ipso-radical cyclization onto aromatic rings of five-membered alicyclic amino acids bearing N-(2-phenyl)benzoyl groups by photoinduced electron transfer promoted decarboxylation
A new radicalcyclization has been developed for the one-step synthesis of spiro dihydroisoquinolinone derivatives from alicyclic amino acids bearing N-(2-phenyl)benzoyl groups through photoinduced electron transfer (PET)-promoted decarboxylation. Reductive ipso-radical cyclization onto a benzene ring by an alkyl radical is achieved under mild conditions for the first time, although the substrates
Ruthenium(<scp>ii</scp>)-catalyzed ortho-C–H arylation of diverse N-heterocycles with aryl silanes by exploiting solvent-controlled N-coordination
作者:Pradeep Nareddy、Frank Jordan、Michal Szostak
DOI:10.1039/c7ob00818j
日期:——
We report the first method for the direct, regioselectiveRu(II)-catalyzed oxidative arylation of C–H bonds in diverse N-heterocycles with aryl silanes by exploiting solvent-controlled N-coordination. The reaction takes advantage of the attractive features of organosilanes as coupling partners, providing proof of concept for N-directed Ru(II)-catalyzed C–H arylation. This novel, operationally-simple
Selective and Catalytic Arylation of <i>N</i>-Phenylpyrrolidine: sp<sup>3</sup> C−H Bond Functionalization in the Absence of a Directing Group
作者:Bengü Sezen、Dalibor Sames
DOI:10.1021/ja050269o
日期:2005.4.1
We herein describe our studies on arylation of N-phenylpyrrolidine, which led to the development of a new transformation for the direct and selective arylation of sp3 C-H bonds in the absence of a directing group. In this method, Ru(H)2(CO)(PCy3)3 4 was used as the catalyst, and preliminary mechanistic studies suggested that Ru(Ph)(I)(CO)(PCy3)2 5 is the key intermediate of the catalytic cycle. A large
Ruthenium(II)-Catalyzed Regioselective C–H Arylation of Cyclic and <i>N</i>,<i>N</i>-Dialkyl Benzamides with Boronic Acids by Weak Coordination
作者:Pradeep Nareddy、Frank Jordan、Stacey E. Brenner-Moyer、Michal Szostak
DOI:10.1021/acscatal.6b01360
日期:2016.7.1
arylation of cyclic and N,N-dialkyl benzamides with boronic acids enabled by versatileruthenium(II) complexes. This method features a general C–H arylation of ubiquitous aromatic tertiary benzamides by weak O-coordination. The transformation is characterized by its operational simplicity, the use of inexpensive, air-stable Ru(II) catalysts, scalability, and wide substrate scope. The reaction proceeds
Highly chemoselective ruthenium(<scp>ii</scp>)-catalyzed direct arylation of cyclic and N,N-dialkyl benzamides with aryl silanes
作者:Pradeep Nareddy、Frank Jordan、Michal Szostak
DOI:10.1039/c7sc00156h
日期:——
first time. This novel protocol enlists challenging cyclic and N,N-dialkyl benzamides as weakly-coordinating substrates to achieve highly regioselective C(sp2)–H arylation as a proof-of-concept, taking advantage of the attractive features of organosilanes as coupling partners. This innovative method is characterized by very high chemoselectivity, installing halide functional groups (I, Br, Cl) that are