DABCO-Catalyzed Synthesis of Thiazolidine-2-thiones: System Development and Mechanistic Insights.

ABSTRACT: A base-catalyzed protocol is reported for the construction of 1,3-thiazolidine-2-thione scaffolds bearing quaternary carbon centers from carbon disulfide and α-tertiary propargylamines. The reaction proceeds using low catalyst loading, under ambient temperatures, and in the absence of solvent. Various α-tertiary propargylamines have been employed, affording a series of previously unreported thiazolidine-2-thione compounds and avoiding purification via column chromatography in certain cases. We also describe a one-pot strategy for the synthesis of the same products through a KA² coupling-CS₂ incorporation approach. The reaction mechanism and substituent-dependent catalytic behavior were studied through a combination of detailed experimental and computational studies.

SUBMITTER: Chalkidis SG 

PROVIDER: S-EPMC11959531 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature