Metal Acetylide Elimination: The Key Step in the Cascade Decomposition and Transformation of Metalated Propargylamines
作者:Matthew T. Flynn、Victoria L. Blair、Philip C. Andrews
DOI:10.1021/acs.organomet.8b00047
日期:2018.4.23
Metal acetylide elimination facilitates a novel one-pot cascade metalation and elimination/addition route to a series of unsymmetrical secondary amines from the reaction of secondary propargylamines with organometallic reagents. Spectroscopic evidence suggests a dimetalated amido intermediate rather than an allene.
Arylsilsesquioxane gels and related materials. New hybrids of organic and inorganic networks
作者:K. J. Shea、D. A. Loy、O. Webster
DOI:10.1021/ja00043a014
日期:1992.8
Molecular building blocks for the preparation of amorphous hybrid organic-inorganic network materials have been synthesized. Hydrolysis and condensation of bis(triethoxysilyl)aryl 1-4 and -ethynyl 5 monomers results in formation of aryl- and ethynyl-bridged polysilsequioxanes in the form of xerogels. The gels were glasslike materials composed of uniform aggregate of particles between 50 and 80 nm in