(1R,1′R)-di-born-2-eno[2,3-c;3′,2′-e][1,2]dithiin, ein cyclisches disulfid mit ungewöhnlichen eigenschaften
作者:Werner Schroth、Ekkehard Hintzsche、Roland Spitzner、Hermann Irngartinger、Volker Siemund
DOI:10.1016/s0040-4039(00)73025-5
日期:1994.3
The title compound 8, obtained by oxidation of bis-thiocamphor 6, represents a kinetically stabilized disulfide. Despite deeply colored, as usual in the 1,2-dithiine series, 8 displays various other features in strict contrast to the normal behaviour of 1,2-dithiines. Thus, 8 prefers S-insertion to the 1,2,3-trithiepine 14 instead of S-extrusion to the thiophene 12. Furthermore, ring opening by nucleophilic reagents is followed by 1,5-H-shifts leading to blue enthiones, e.g. 17, 18, and 19.