A Sulfoxide-Promoted, Catalytic Method for the Regioselective Synthesis of Allylic Acetates from Monosubstituted Olefins via C−H Oxidation
作者:Mark S. Chen、M. Christina White
DOI:10.1021/ja039107n
日期:2004.2.1
promote C-H oxidation versus Wacker oxidation chemistry and to control the regioselectivity in the C-H oxidation products. A catalytic method for the direct C-H oxidation of monosubstituted olefins to linear (E)-allylic acetates in high regio- and stereoselectivities and preparatively useful yields is described. The method using benzoquinone as the stoichiometric oxidant and 10 mol % of Pd(OAc)2 or Pd(O2CCF3)2
A New Route for Generation of α-λ<sup>3</sup>-Iodanyl Ketones via Ester Exchange of (<i>Z</i>)-(β-Acetoxyvinyl)-λ<sup>3</sup>-iodanes: Their Nucleophilic Substitutions with Halides and Sulfur and Phosphorus Nucleophiles
作者:Masahito Ochiai、Junichi Nishitani、Yoshio Nishi
DOI:10.1021/jo0107711
日期:2002.6.1
An efficient method for generation of alpha-lambda3-iodanyl ketones from (Z)-(2-acetoxyvinyl)(phenyl)-lambda3-iodanes was developed. The method involves ester exchange of (Z)-2-acetoxyvinyl-lambda3-iodanes with methanol in the presence of triethylamine. alpha-lambda3-Iodanyl ketones react with a variety of nucleophiles such as halides, thiols, phosphines, phosphinic acids, and phosphates, under the
Palladium catalyzed indirect electrochemical acetoxylation of olefins
作者:Frederick W. Hartstock、Danial D.M. Wayner
DOI:10.1016/0040-4039(94)88264-9
日期:1994.10
Olefins are acetoxylated to allylic and vinylic unsaturated esters by palladium (II) acetate catalyst in combination with controlled current anodic reoxidation and copper (II) acetate as an electron transfer agent.
Gold(I)-Catalyzed Addition of Carboxylic Acids to Alkynes
作者:Bathoju Chandra Chary、Sunggak Kim
DOI:10.1021/jo101543q
日期:2010.11.19
Au(I)-catalyzed hydroacyloxylation of alkynes with carboxylic acids is described PPh3AuCl/AgPF6 catalyst affords the Markonikov addition products, whereas PPh3AuCl/AgOTf catalyst gives the more stable isomerized products via the Markonikov products
Borane-induced radical reduction of 1-alkenyl- and 1-alkynyl-λ3-iodanes with tetrahydrofuran
Exposure of 1-alkenyl(phenyl)- and 1-alkynyl(phenyl)-lambda(3)-iodanes to THF at room temperature in the presence of a catalytic amount of trialkylborane results in smooth reduction to give 1-iodo-1-alkenes and 1-iodo-1-alkynes as major products, respectively. The key step in the reductions probably involves a single-electron transfer from alpha-tetrahydrofuryl radical to the lambda(3)-iodanes, which generates the labile [9-I-2] iodanyl radicals. (C) 2003 Elsevier Science Ltd. All rights reserved.