Aryl-Substituted Cyclopropyl Acetylenes as Sensitive Mechanistic Probes in the Gold-Catalyzed Hydration of Alkynes. Comparison to the Ag(I)-, Hg(II)-, and Fe(III)-Catalyzed Processes
作者:Georgia Velegraki、Manolis Stratakis
DOI:10.1021/jo401325t
日期:2013.9.6
of vinyl carbocations, provides exclusively the corresponding cyclopropylmethylketones. On the other hand, in the Ag(I)- or Fe(III)-catalyzed hydration, a profound vinyl carbocationic character appears in the initially formed metal–alkyne complexes, as judged by the partial (Ag+) or exclusive (Fe3+) formation of allene-type rearrangement products. These findings provide clear evidence for subtle electronic
The palladium-catalyzed allene transformation reaction from propargylic amines proceeded in the presence of Pd2(dba)3·CHCl3 (5 mol %) and (C6F5)2PC2H4P(C6F5)2 (10 mol %) in CHCl3 at room temperature to give the corresponding allenes in good to high yields. Dicyclohexyl groups substituted on the nitrogen of propargylic amines were found to be effective for the current transformation and the conjugated
在Pd 2(dba)3 ·CHCl 3(5 mol%)和(C 6 F 5)2 PC 2 H 4 P(C 6 F 5)2(Pd 2(dba)3在室温下,将其在CHCl 3中的10mol%)以高至高收率得到相应的烯丙基。发现在炔丙基胺的氮上取代的二环己基可有效地进行电流转化,并由相应的炔丙基胺3合成了共轭烯-丙二烯4 在温和的条件下。
Holm, Kjetil H.; Skatteboel, Lars, Acta chemica Scandinavica. Series B: Organic chemistry and biochemistry, 1984, vol. 38, # 9, p. 783 - 794
作者:Holm, Kjetil H.、Skatteboel, Lars
DOI:——
日期:——
BESTMANN, H. J.;FREY, H., SYNTHESIS, BRD, 1984, N 3, 243
作者:BESTMANN, H. J.、FREY, H.
DOI:——
日期:——
HOLM, K. H.;SKATTEBOL, L., ACTA CHEM. SCAND., 1984, 38, N 9, 783-794