Background: 1,4-Dithiane-2,5-diol (1,4-DTD) is the stable dimer of α-mercapto acetaldehyde. This
commercially available ambidentade compound is characterized as having in its chemical structure one group
that acts as an electrophile and another that acts as a nucleophile, this permits its use as versatile and efficient
synthon in synthetic heterocycle procedures.
Objective: The aim of this review is to present synthetic applications of 1,4-DTD in heterocyclic chemistry and
their applicability to the synthesis of bioactive compounds.
Conclusion: Gewald reactions to obtain C-4 and C-5 unsubstituted 2-amino-thiophene derivatives; sulfa-
Michael/Henry and sulfa-Michael/aldol sequences to obtain polysubstituted tetrahydrothiophenes, and other
heterocyclic reactions that allow synthesizing several functionalized sulfur-containing heterocycles such as thiazolidines,
oxathiazinoles and thiazoles are presented and discussed. The use of such heterocyclics in subsequent
reactions allows obtaining various bioactive compounds including the antiretroviral lamivudine which is
one of the examples presented in this review.
Keywords: 1, 4-dithiane-2, 5-diol, 2-amino-thiophene, Gewald reaction, sulfur heterocycles, sulfanyl carbonyl, tetrahydrothiophene.
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