Elemental Sulfur/DMSO‐Promoted Multicomponent One‐pot Synthesis of Malonic Acid Derivatives from Maleic Anhydride and Amines
作者:Le Anh Nguyen、Pascal Retailleau、Thanh Binh Nguyen
DOI:10.1002/adsc.201900160
日期:2019.6.18
Malonicacidderivatives could be conveniently prepared with high degree of functional flexibility via redox condensation reactions between anhydride maleic, amines, elemental sulfur and DMSO as oxidant. This multicomponent decarboxylative transformation consists in a cascade of ring opening, decarboxylative oxidative thioamidation at temperature as low as 50 °C.
A Novel Route to Methyl 3-(3,4-Disubstituted 5-alkylthio/amino-2-thienyl) propenoates
作者:A. Datta、H. Ila、H. Junjappa
DOI:10.1055/s-1988-27638
日期:——
The 3-oxodithioesters 1 and 3-oxothioamides 6 are shown to undergo base catalyzed S-alkylation with methyl 4-bromocrotonate followed by intramolecular condensation to give the corresponding methyl 3-(3,4-disubstituted 5-alkylthio/amino-2-thienyl) propenoates 5 and 7 in good yields.