37489-99-9Relevant articles and documents
Switching Selectivity of α-Enolic Dithioesters: One Pot Access to Functionalized 1,2- and 1,3-Dithioles
Koley, Suvajit,Chanda, Tanmoy,Samai, Subhasis,Singh, Maya Shankar
, p. 11594 - 11602 (2016)
An operationally simple cascade protocol has been developed for the construction of 1,2- and 1,3-dithiole derivatives from α-enolic dithioesters. 1,2-Dithioles are achieved by the reaction of dithioesters with elemental sulfur in the presence of InCl3 under solvent-free conditions. 1,3-Dithioles have been constructed via DABCO mediated self-coupling of dithioesters in open air enabling the formation of two new C-S bonds and one ring in a single operation in contiguous fashion. The reactions proceeded smoothly affording the desired sulfur-rich heterocycles in good to excellent yields, exhibiting gram-scale ability and broad functional group tolerance utilizing easy to handle cheap and easily available reagents. The probable mechanisms for the formation of 1,2- and 1,3-dithioles from α-enolic dithioesters have been suggested.
Copper-Catalyzed Defluorinative Thioannulation of Trifluoropropynes for the Synthesis of 1,2-Dithiole-3-thiones
Wei, Feng,Shen, Xiao-Qin,Zhang, Xiao-Hong,Zhang, Xing-Guo
, p. 3911 - 3915 (2018/09/21)
A simple and practical strategy for the preparation of 1,2-dithiole-3-thiones via copper-catalyzed defluorinative thioannulation of trifluoropropynes has been developed using elemental sulfur as the sole sulfur source. This reaction displays a wide substrate scope and high functional group tolerance to afford the corresponding S-heterocycles in moderate to good yields and features efficient construction of multiple C?S bonds through C?F bond cleavage of CF3 groups. (Figure presented.).
