Microwave-assisted Suzuki–Miyaura cross-coupling of 2-alkyl and 2-alkenyl-benzo-1,3,2-diazaborolanes
摘要:
Nitrogen-based boronate esters, such as 2-octyl-benzo-1,3,2-diazaborolane, 2-phenethyl-benzo-1,3,2-diazaborolane, and 2-{(1E)-hexenyl}-benzo-1,3,2-diazaborolane have been shown to be suitable coupling partners with arylhalides in microwave accelerated Suzuki cross-coupling reactions. Reaction yields of up to 89% were achieved. The use of a silicon group attached to the nitrogen atom, proved to enhance the reactivity of 2-octyl-benzo-1,3,2-diazaborolane. (C) 2011 Elsevier Ltd. All rights reserved.
Substituted arylmethyl phenyl ethers. 1. A novel series of 5-lipoxygenase inhibitors and leukotriene antagonists
作者:John H. Musser、Utpal R. Chakraborty、Stanley Sciortino、Robert J. Gordon、Atul Khandwala、Edward S. Neiss、Thaddeus P. Pruss、Richard Van Inwegen、Ira Weinryb、Stephen M. Coutts
DOI:10.1021/jm00384a017
日期:1987.1
compound, 2-[[3-(1-hydroxyhexyl)phenoxy]-methyl]quinoline (33), had an I50 of 0.12 microM in the rat PMN 5-LO assay and an I50 of 3.6 microM in the leukotriene-induced contraction of GP lung parenchymal strips, and it also showed 91% inhibition of SRS-A-mediated bronchospasm in the GP in vivo at 10 mg/kg, administered intraduodenally. Some of the compounds in this series were also leukotriene antagonists
Flash vacuum thermolysis of spirocyclohexadienones
作者:Leonardus W. Jenneskens、Willem H. De Wolf、Friedrich Bickelhaupt
DOI:10.1016/s0040-4020(01)91398-5
日期:1985.1
In an attempt to prepare short-bridged hydroxymetacyclophanes 1b-d, the spirocyclohexadienones 2b-d were pyrolyzed by flashvacuumthermolysis (FVT). Instead of 1b-d, variable amounts of 4-(5-hexenyl)phenol (4b), β-hydroxybenzocycloalkenes (5b-d) and 4-(trans-1-alkenyl) phenols (6c-d) were obtained. The formation of these products is explained by invoking cleavage of a spiro bond in 2 under formation