Diversity oriented catalyst-free and solvent-free one-pot MCR at room temperature: rapid and regioselective convergent approach to highly functionalized dihydro-4H-thiopyrans
Highly convergent and regioselective approach to hitherto unreported and synthetically demanding 6-cycloamino-2-(methyl/benzyl)sulfanyl-3-(aroyl/hetaroyl/alkanoyl)-4-aryl-5,6-dihydro-4H-thiopyrans has been developed via one-pot three-component domino coupling of β-oxodithioesters, α,β-unsaturated aldehydes, and cyclic aliphatic secondary amines at roomtemperature under catalyst-free and solvent-free
An efficient and experimentally rapid protocol for the synthesis of hitherto unreported 2,3-dicarboalkoxy-4-aroyl/heteroaroyl/alkanoyl thiophenes has been developed via 1–2 (C–S) and 3–4 (C–C) bond connections promoted by 4-dimethylaminopyridine (DMAP). Optimally, the reaction takes only 3–5 min when β-oxodithioester and dialkyl acetylenedicarboxylate are stirred in DCM at room temperature in the presence