New Entry to a Three-Component Pyrimidine Synthesis by TMS−Ynones via Sonogashira Coupling
作者:Alexei S. Karpov、Thomas J. J. Müller
DOI:10.1021/ol035212q
日期:2003.9.1
synthesized in an atom-economical fashion by coupling (het)aroyl chlorides and (TMS)-acetylene with only one equiv (!) of triethylamine under Sonogashira conditions. This mild ynone synthesis is also a suitable entry to 2,4-disubstituted pyrimidines in the sense of a one-pot three-component reaction, i.e., a coupling-addition-cyclocondensation sequence.
Straightforward Novel One-Pot Enaminone and Pyrimidine Syntheses by Coupling-Addition-Cyclocondensation Sequences
作者:Thomas J. Müller、Alexei S. Karpov
DOI:10.1055/s-2003-42480
日期:——
The coupling of acid chlorides 1 with terminal alkynes 2using only one equivalent (!) of triethylamine under Sonogashira conditions followed by subsequent addition of primary or secondary amines 4 to the intermediate alkynones 3 represents a straightforward one-pot three component access to enaminones 5 undermildconditions and in excellent yields. Furthermore, 2,4-di- and 2,4,6-trisubstituted pyrimidines
Novel Microwave-Assisted One-Pot Synthesis of Isoxazoles by a Three-Component Coupling-Cycloaddition Sequence
作者:Thomas Müller、Benjamin Willy、Frank Rominger
DOI:10.1055/s-2007-1000856
日期:2008.1
The consecutive Sonogashira coupling of acid chlorides with terminal alkynes, followed by 1,3-dipolar cycloaddition under dielectric heating of in situ generated nitrile oxides from hydroximinoyl chlorides furnishes isoxazoles in moderate to good yields in the sense of a one-pot three-component reaction.
Synthesis of Ynones via Recyclable Polystyrene-Supported Palladium(0) Complex Catalyzed Acylation of Terminal Alkynes with Acyl Chlorides under Copper- and Solvent-Free Conditions
Herein, a highly efficient method for the copper- and solvent-freecoupling reaction of acyl chlorides and terminal alkynes catalyzedby 1-phenyl-1,2-propanedione-2-oxime thiosemicarbazone-functionalizedpolystyrene resin-supported Pd(0) complex is described. Acyl chloridesare easily coupled with terminal alkynes, giving good to high yieldsin the presence of a low catalyst loading (1 mol% Pd) inEt 3 N
在此,描述了一种由 1-苯基-1,2-丙二酮-2-肟氨基硫脲官能化聚苯乙烯树脂负载的 Pd(0) 配合物催化的酰氯和末端炔烃的无铜和无溶剂偶联反应的高效方法。酰氯很容易与末端炔烃偶联,在室温和有氧条件下,在 Et 3 N 中存在低催化剂负载量(1 mol% Pd)的情况下,可产生良好或高产率。离心后,负载型催化剂可以回收和重复使用多次,活性仅略有下降。
Brønsted Acid Catalyzed Peterson Olefinations
作者:Thomas K. Britten、Mark G. McLaughlin
DOI:10.1021/acs.joc.9b02489
日期:2020.1.17
A mild and facile Peterson olefination has been developed employing low catalyst loading of the Brønstedacid HNTf2. The reactions are typically performed at room temperature, with the reaction tolerant to a range of useful functionalities. Furthermore, we have extended this methodology to the synthesis of enynes.