Improved Synthesis of Aryltrialkoxysilanes via Treatment of Aryl Grignard or Lithium Reagents with Tetraalkyl Orthosilicates
作者:Amy S. Manoso、Chuljin Ahn、Arash Soheili、Christopher J. Handy、Reuben Correia、W. Michael Seganish、Philip DeShong
DOI:10.1021/jo048667h
日期:2004.11.1
General reaction conditions for the synthesis of aryl(trialkoxy)silanes from aryl Grignard and lithium reagents and tetraalkyl orthosilicates (Si(OR)4) have been developed. Ortho-, meta-, and para-substituted bromoarenes underwent efficient metalation and silylation at low temperature to provide aryl siloxanes. Mixed results were obtained with heteroaromatic substrates: 3-bromothiophene, 3-bromo-4-methoxypyridine
New convenient methods of sila- and germatranes synthesis from ethoxy-and tetraorganylsilanes and -germanes have been elaborated. The reaction of ethoxysilanes with boratrane in the presence of catalytic amounts of metal alcoholates has been investigated. Dimethylformamide (DMF) as a solvent and NaOEt as a catalyst used instead of xylene and Al(O-i-Pr)(3) were found to give better yields. The possibility of using alkoxy-, aminosilanes, tetraethoxygermane and even tetraorganylsilanes in this reaction leading to the corresponding atranes with good yields has been demonstrated. Triethanolamine in the presence of catalytic amounts of base or CsF easily substitutes furyl-, dihydrofuryl-, dihydropyranyl- and thienyl groups in tris-and tetraheterylsilanes, leading to organylsilatranes with good to excellent yields. (C) 1997 Elsevier Science S.A.
Lukevits, E.; Erchak, N. P.; Matorykina, V. F., Journal of general chemistry of the USSR, 1983, vol. 53, # 5, p. 959 - 967
作者:Lukevits, E.、Erchak, N. P.、Matorykina, V. F.、Mazheika, I. B.
DOI:——
日期:——
Lukevits, E'.; Pudova, O. A.; Popelis, Yu., Journal of general chemistry of the USSR, 1981, vol. 51, # 2, p. 300 - 304
作者:Lukevits, E'.、Pudova, O. A.、Popelis, Yu.、Erchak, N. P.