Hydrogen peroxide mediated formation of heteroaryl ethers from pyridotriazol-1-yloxy heterocycles and arylboronic acids
作者:Sujata Bardhan、Keiko Tabei、Zhao-Kui Wan、Tarek S. Mansour
DOI:10.1016/j.tetlet.2009.07.135
日期:2009.10
Pyridotriazol-1-yloxypyrimidine 3 reacts with arylboronic acids under palladium-free, Cs2CO3, (0.8%) H2O2, and DME conditions to produce heteroaryl ethers 4-16 in good yields comparable to the oxidative palladium-catalyzed reaction. The yields of aryl ethers 17-19 from quinazoline 2 with (0.8%) H2O2 were modest. Hydrogen peroxide is Superior to dioxygen as an oxidant in these reactions. (C) 2009 Elsevier Ltd. All rights reserved.
Wacharasindhu, Sumrit; Bardhan, Sujata; Wan, Zhao-Kui, Journal of the American Chemical Society, 2009, vol. 131, p. 4174 - 4175
作者:Wacharasindhu, Sumrit、Bardhan, Sujata、Wan, Zhao-Kui、Tabei, Keiko、Mansour, Tarek S.
A RTV organopolysiloxane composition comprising (A) an organopolysiloxane containing at least two Si—OH or organoxy radicals and having a viscosity of at least 500 mPa-s at 25° C., (B) an organosilane containing at least two organoxy radicals, (C) an organotin catalyst, and (D) an Si—OH radical-containing organopolysiloxane having a viscosity of up to 300 mPa-s at 25° C. It has shelf stability and discoloration resistance in the uncured state and exhibits rubber elasticity and adhesion in the cured state.
US7534840B2
申请人:——
公开号:US7534840B2
公开(公告)日:2009-05-19
[EN] HETEROARYL ETHERS AND PROCESSES FOR THEIR PREPARATION<br/>[FR] HÉTÉROARYL ÉTHERS ET LEURS PROCÉDÉS DE PRÉPARATION
申请人:WYETH CORP
公开号:WO2009058937A2
公开(公告)日:2009-05-07
The present invention relates to processes for the preparation of of heteroaryl ethers. In some embodiments, the processes relate to cross coupling reactions between triazol-1-yloxy and triazol-1-yl heterocycles with aryl boronic acids. In a further aspect, this invention also relates to compounds that are useful for the treatment of oncological diseases or disorders, and for the treatment of inflammation.