在Au我催化的2- alkynylphenol衍生物的氟化水合的Selectfluor的存在[1-氯甲基-4-氟-1,4- diazoniabicyclo- [2.2.2]辛烷双(四氟硼酸盐)]已被开发。该方法可在Au I / Au III氧化还原催化循环的基础上,一步一步直接获得具有C-O,C = O和C-F键的α-氟苯并呋喃酮。还进行了一些对照实验,包括该反应的不对称变体,以深入了解反应机理。
A highly efficient PtO2/PTSA catalyst system for the hydration of a wide array of alkynes was developed. This method proved to be compatible with a large range of functional groups and the ketone products were obtained in high yields. The scope of this methodology was also extended to the synthesis of 3-aryl-isochromenones, -indoles and -benzofurans.
SbF5−MeOH catalytic system efficiently promotes the alkyne−carbonyl metathesis of o-alkynylaniline derivatives and aldehydes to afford 2,3-disubstituted dihydroquinolinones in moderate to high yields with high trans-selectivity.
Heterocycles by PtCl<sub>2</sub>-Catalyzed Intramolecular Carboalkoxylation or Carboamination of Alkynes
作者:Alois Fürstner、Paul W. Davies
DOI:10.1021/ja055659p
日期:2005.11.1
carboalkoxylation, hydroamination, and carboamination reactions of alkynes, effecting the formation of substituted benzo[b]furan, indole-, and isochromene-1-one derivatives, respectively. This procedure allows for the transfer of (substituted) allyl, methoxymethyl (MOM), benzyloxymethyl (BOM), and (trimethylsilyl)ethoxymethyl (SEM) groups from oxygen to carbon and is compatible with functional groups
PtCl2 是炔烃分子内加氢烷氧基化、碳烷氧基化、加氢胺化和氨基化反应的方便催化剂,分别影响取代的苯并[b]呋喃、吲哚-和异色烯-1-酮衍生物的形成。此过程允许(取代的)烯丙基、甲氧基甲基 (MOM)、苄氧基甲基 (BOM) 和(三甲基甲硅烷基)乙氧基甲基 (SEM) 基团从氧转移到碳,并且与易于氧化插入低价的官能团相容以前用于类似目的的金属种类。尽管某些反应甚至可以在空气中进行,但在 CO 气氛下进行时反应速率会显着增加。 提出了一个机械原理,
3,3′-Bis(arylbenzofurans) via a Gold-Catalyzed Domino Process
作者:Hermann Wegner、Mathieu Auzias、Markus Neuburger
DOI:10.1055/s-0030-1258566
日期:2010.10
A new heterogeneous gold-catalyzed system for the dominocyclizationoxidativecoupling of 2-alkynyl phenols for the formation of 3,3`-bisbenzofurans was developed. The substrate and the catalyst scope as well as the reaction conditions were investigated and optimized. This method provides access to this novel structural theme in two steps starting from commercially available chemicals. The molecular
作者:A. Stephen K. Hashmi、Tanuja Dondeti Ramamurthi、Frank Rominger
DOI:10.1002/adsc.201000011
日期:——
and triethylamine gave the aurated heterocycles as stable intermediates of the corresponding gold(I)‐catalysed hydrooxylation and hydroamination reactions. X‐ray crystal structure analyses of both products could be obtained. A similar internal alkyl‐substituted ortho‐alkynylphenol gave only the cycloisomerised product, no aurated intermediate could be detected.