1,4-Palladium Shift/C(sp<sup>3</sup>)–H Activation Strategy for the Remote Construction of Five-Membered Rings
作者:Ronan Rocaboy、Olivier Baudoin
DOI:10.1021/acs.orglett.9b00187
日期:2019.3.1
functionalization of remote C–H bonds from simple precursors. In this work, we report a novel and simple Pd0-catalyzed domino reactioninvolving 1,4-palladium shift and C(sp3)–H activation and leading to (fused) five-membered rings. This method allowed access to a broad range of valuable arylidene γ-lactams and indanones and was applied to the formalsynthesis of (−)-pyrrolam.
The transesterification occurred for a wide range of combinations of esters and alcohols at 0 to −40 °C. To the best of our knowledge, this is the first successful transesterification at such lowtemperatures. The time–conversion plots for the transesterification show that the reaction reached equilibrium within 5 min at 0 °C. The reaction proceeded quantitatively by addition of molecular sieves 4A
Continuous hydroamination in a liquid–liquid two-phase systemElectronic supplementary information (ESI) available: experimental details. See http://www.rsc.org/suppdata/cc/b1/b111630d/
作者:Volker Neff、Thomas E. Müller、Johannes A. Lercher
DOI:10.1039/b111630d
日期:2002.4.11
The direct addition of NH across a CC multiple bond (hydroamination) was efficiently catalysed in a liquidâliquid two-phase system. The latter comprised a polar catalyst phase of Zn(CF3SO3)2 in the ionic liquid 1-ethyl-3-methylimidazolium trifluoromethanesulfonate and a substrate mixture in heptane. The possibility of catalysing different hydroamination reactions continuously was demonstrated.
Metal catalysed addition of B–H and N–H bonds to aminopropyl vinyl ethers
作者:Christopher M. Vogels、Paul G. Hayes、Michael P. Shaver、Stephen A. Westcott
DOI:10.1039/a908206i
日期:——
The rhodium catalysed addition of pinacolborane to aminopropyl vinyl ethers gave selective formation of the corresponding alkenylboronate esters while palladium or platinum complexes catalysed the hydroamination of aminopropyl vinyl ether to give tetrahydro-2-methyl-1,3-oxazine.
Co-catalysis between Mn+ and H+ in the direct addition of N–H bonds to CC double and triple bonds
作者:Ruo Qing Su、Thomas E. Müller
DOI:10.1016/s0040-4020(01)00561-0
日期:2001.7
A kinetic analysis of the addition of amines to CC double and triplebonds using different transition metal catalysts is presented. It is shown that the reaction is initiated by the Lewis acidic metal centres. In the presence of protons, the rate of reaction is drastically increased. The key role played by the protons in the catalytic system is discussed. Therefore, Brønsted and Lewis acids, and their