Direct Synthesis of γ‐Keto Sulfones from Allylic Alcohols: One‐Pot Palladium(II)‐Catalyzed Generation of Enones Followed by Water‐Mediated 1,4‐Addition of Organosulfinates
作者:Mari Vellakkaran、Murugaiah M. S. Andappan、Kommu Nagaiah、Jagadeesh Babu Nanubolu
DOI:10.1002/ejoc.201600494
日期:2016.7
which indicated a chemoselective catalytic system for the preparation of halogen-bearing γ-keto sulfones. This one-pot method does not require an acid, a base, or isolation of any intermediate. Control experiments indicated that the active catalyst of the first step also promoted the subsequent C–S bond-formation reaction. Water was found to accelerate the reaction rate and to be involved in the protonolysis
4-[(4-Methylphenyl)sulfonyl]-1-(triphenylphosphoranylidene)-2-butanone and its dianion as versatile tools in organic synthesis
作者:Achille Barco、Simonetta Benetti、Carmela De Risi、Paolo Marchetti、Gian P. Pollini、Vinicio Zanirato
DOI:10.1016/s0040-4039(98)00108-7
日期:1998.4
The title compound and the corresponding dianion have been used as convenient precursors for substituted divinyl ketones in both carbo-and heterocyclization reactions in a one-pot three-step sequence leading to substituted carbo-and heterocyclic ring systems and for the construction of the 4-keto-2-alkenoate subunit, a common structural feature of a variety of natural compounds, respectively. (C) 1998 Elsevier Science Ltd. All rights reserved.
MESSINGER, P.;VIETINGHOFF-SCHEEL, R. V., ARCH. PHARM., 1985, 318, N 11, 961-968