Method of producing an o-disubstituted aromatic compound, and method of producing a monosubstituted-monohaloaromatic compound
申请人:Yoshida Jun-ichi
公开号:US20080194816A1
公开(公告)日:2008-08-14
A method of producing an o-disubstituted aromatic compound, containing: continuously conducting at least the following steps (a) to (d):
(a) a step of mono-lithiating one halogen atom of an o-dihaloaromatic compound, using a first microreactor;
(b) a step of making the thus-obtained monolithiated product to react with an electrophilic compound, using a second microreactor, to obtain a monosubstituted-monohaloaromatic compound;
(c) a step of lithiating the other halogen atom of the o-dihaloaromatic compound, using a third microreactor; and
(d) a step of making the thus-obtained lithiated product successively to react with an electrophilic compound, using a forth microreactor.
Ruthenium-Catalyzed Site-Selective Intramolecular Silylation of Primary C–H Bonds for Synthesis of Sila-Heterocycles
作者:Huaquan Fang、Wenjun Hou、Guixia Liu、Zheng Huang
DOI:10.1021/jacs.7b06798
日期:2017.8.23
medicinal chemistry. Moreover, organosilanes are valuable synthetic intermediates for fine chemicals and materials. Transition metal-catalyzed C-H silylation has become an important strategy for C-Si bondformations. However, despite the great advances in aromatic C(sp2)-H bond silylations, catalytic methods for aliphatic C(sp3)-H bond silylations are relatively rare. Here we report a pincer ruthenium
Rhodium-Catalyzed Carbonylative Synthesis of Benzosilinones
作者:Bo Chen、Xiao-Feng Wu
DOI:10.1021/acs.orglett.9b00930
日期:2019.4.19
In this work, a novel and practical procedure for the synthesis of benzosilinones by carbonylative cyclization has been developed. Various benzosilinones were isolated in moderate to good yields, using rhodium as the catalyst with good functional group tolerance. Not only symmetric alkynes but also nonsymmetric alkynes are applicable with excellent regioselectivity and good yields. Remarkably, this
Synthesis, reactions, and photophysical properties of o-(alkoxysilyl)(borafluorenyl)benzenes
作者:Tomomi Shimizu、Atsushi Kawachi
DOI:10.1016/j.jorganchem.2020.121179
日期:2020.4
Abstract The synthesis, reactions, and photophysicalproperties of o-(alkoxysilyl)(borafluorenyl)benzenes 4 are reported. Compounds 4 were prepared by the reaction of o-(silyl)(lithio)benzenes 6 with (alkoxy)borafluorenes 7. The C–O bonds in 4 are activated by intramolecular coordination of the oxygen atom to the boron atom, as confirmed by reactions with nucleophiles and density functional theory