that disiloxanes were effectively constructed of hydrosilanes catalyzed by gold on carbon in water as the solvent and oxidant in association with the emission of hydrogen gas at room temperature. The present oxidation could proceed via various reaction pathways, such as the hydration of hydrosilane into silanol, dehydrogenative coupling of hydrosilane into disilane, and the subsequent corresponding
We report here an efficient non-aqueous route to symmetrical disiloxanes from their corresponding organosilanes using Ni(COD)2 with 3,4,7,8-tetramethyl-1,10-phenanthroline in air. Our methodology is very simple and high yielding. The reaction mechanism is also proposed.
Preparation of the iodides (Me3Si)2C(SiMe2C6H4Y)(SiMe2I) and some related compounds
作者:Colin Eaborn、Karen L. Jones、Paul D. Lickiss
DOI:10.1016/0022-328x(94)88026-3
日期:1994.2
The preparations of: (a) the iodides (Me3Si)2C(SiMe2C6H4Y)(SiMe2I) (Y = H,p- OMe,p-Me,p-Cl,m-CF3),via the corresponding hydrides; (b) the compounds (Me3Si)2C(SiMe2Ph)(SiMe2X) with X = F, O2CCF3, O2CCH3, OMe, N3, NCS and Cl; and (c) the iodide (p-MeC6H4)3CSiMe2I are described.
Aryl-Aryl Bond Formation by the Fluoride-Free Cross-Coupling of Aryldisiloxanes with Aryl Bromides
作者:Christine M. Boehner、Elizabeth C. Frye、Kieron M. G. O'Connell、Warren R. J. D. Galloway、Hannah F. Sore、Patricia Garcia Dominguez、David Norton、David G. Hulcoop、Martin Owen、Gillian Turner、Claire Crawford、Helen Horsley、David R. Spring
DOI:10.1002/chem.201102285
日期:2011.11.18
synthetically important molecules has inspired considerable interest in the development of methods for aryl–arylbondformation. Herein we describe a novel strategy for this process involving the fluoride‐free, palladium‐catalysed cross‐coupling of readily accessible aryldisiloxanes and arylbromides. Using a statistical‐based optimisation process, preparatively useful reaction conditions were formulated