Single-Pot Preparation of 4-Amino-2-(het)aryl-5-Substituted Thiazoles Employing Functionalized Dithioesters as Thiocarbonyl Precursors
作者:Anusha Avadhani、Pethaperumal Iniyavan、Yogendra Kumar、Hiriyakkanavar Ila
DOI:10.1021/acs.joc.1c00616
日期:2021.6.18
4-amino-2-(het)aryl/alkyl-5-functionalized thiazoles has been disclosed, utilizing aryl/heteroaryl/alkyl dithioesters as thiocarbonyl coupling partners in a modified Thorpe–Ziegler type cyclization. The reaction proceeds at room temperature, under mild conditions, in excellent yields, displaying broad functional group compatibility at 2 and 5 positions of thiazoles. This synthetic strategy has been further
Facile Conversion of Dithioesters
into Carboxylic Acids or Esters Using Alkaline Hydrogen
Peroxide
作者:Fabienne Grellepois、Charles Portella
DOI:10.1055/s-0028-1083190
日期:——
Simple, mild, and environmentally friendly procedures for the directconversion of dithioesters into either carboxylicacids or esters using hydrogen peroxide under alkaline conditions are described.
Synthesis of Substituted Benzo[<i>b</i>]thiophenes via Base-Promoted Domino Condensation–Intramolecular C–S Bond Formation
作者:Yogendra Kumar、Hiriyakkanavar Ila
DOI:10.1021/acs.orglett.1c00085
日期:2021.3.5
A novel synthesis of 2,3-substituted benzothiophenes is reported, involving a tandem base-mediated condensation of o-iodoarylacetonitriles/acetates/ketones with (hetero)aryldithioesters and an intramolecular C–S bond formation. The reaction affords diversely substituted benzothiophenes and heterofused thiophenes in excellent yields.
Studies on organophosphorus compounds XLVIII Synthesis of Dithioesters from P,S-Containing Reagents and Carboxylic Acids and Their Derivatives
作者:N.M. Yousif、U. Pedersen、B. Yde、S.-O. Lawesson
DOI:10.1016/s0040-4020(01)96883-8
日期:1984.1
C6H5CH2, C6H8) react with compound Ia at 130°C to give the corresponding methyl dithioesters. Carboxylicacids RCOOH (R = C6H8-CH2, C6H8) react with compound Ib at 200°C for 15 min to give the corresponding ethyl dithioesters, while low boiling acids (R = CH3, C2H8, n-C3H7) yielded mixtures of the corresponding ethyl dithioester and ethyl carboxylate. Carboxylicacid chlorides RCOCl (R = ClCH2, C2H5
由0,0-二甲基二硫代磷酸Ia和P 4 S 10在160℃下制备2,4-二甲硫基-1,3,2,4-二硫代二膦烷2,4-二硫化物IIa 。2,4-双(4-苯氧基苯基)-1,3,2,4-二硫代二ophophaneane 2,4-二硫,IIc和2,4-双(4-苯基硫代苯基)-1,3,2,4-二硫代二膦烷2在4-60℃下分别由P 4 S 10和二苯醚和二苯硫醚制备1,4-二硫化物IId 。羧酸RCOOH(R = CH 3 C 2 H 5,nC 3 H 7,nC 4 H 9,C 6 H 5 CH 2,C 6 H8)在130℃下与化合物Ia反应,得到相应的甲基二硫酯。羧酸RCOOH(R = C 6 H 8 -CH 2,C 6 H 8)在200°C下与化合物Ib反应15分钟,得到相应的乙基二硫酯,而低沸点酸(R = CH 3,C 2 H在图8中,nC 3 H 7)产生相应的二硫代乙酯和羧酸乙酯的混合物。羧酸氯化物RCOCl(R