Silaketals in Intramolecular 1,3-Dipolar Cycloaddition of Nitrile Oxides
作者:Romain Dogbéavou、Livain Breau
DOI:10.1055/s-1997-991
日期:1997.10
A one pot synthesis of unsymmetrical silaketals having a 1,2-disubstituted double bond and a nitro-group is described. These compounds undergo, under mild conditions, regiospecific intramolecular 1,3-dipolar cycloaddition to give a single 2-isoxazoline.
Cyclic (amino)(barrelene)carbene Ru-complexes: synthesis and reactivity in olefin metathesis
作者:Jakub Talcik、Melinda R. Serrato、Antonio Del Vecchio、Sophie Colombel-Rouen、Jennifer Morvan、Thierry Roisnel、Rodolphe Jazzar、Mohand Melaimi、Guy Bertrand、Marc Mauduit
DOI:10.1039/d4dt00102h
日期:——
The synthesis of ruthenium-complexes with cyclic (amino)(barrelene)carbenes (namely CABCs) as ligands is reported. Isolated in moderate to good yields, these new complexes showed impressive thermal stability at 110 °C over several days. Good catalytic performances were demonstrated in various ring-closing metathesis (RCM), macrocyclic–RCM, ring-closing enyne metathesis (RCEYM), cross-metathesis (CM)
报道了以环状(氨基)(桶烯)卡宾(即CABCs)作为配体合成钌配合物。这些新配合物以中等至良好的产率分离,在 110 °C 的几天内表现出令人印象深刻的热稳定性。在各种闭环复分解(RCM)、大环-RCM、闭环烯炔复分解(RCEYM)、交叉复分解(CM)和开环交叉复分解(ROCM)反应中均表现出良好的催化性能。
Silicon tethered ring-closing metathesis reactions for self- and cross-coupling of alkenols
作者:Thomas R. Hoye、Michele A. Promo
DOI:10.1016/s0040-4039(98)02697-5
日期:1999.2
The title process can be used to couple allylic, homoallylic, and bishomoallylic alkenols. Cyclic silaketals with ring sizes from 7-11 members can all be formed. This constitutes a general and versatile strategy for approximately doubling the molecular complexity of readily available alkenol precursors. (C) 1999 Elsevier Science Ltd. An rights reserved.