The synthesis and reactivity of diallenic α-disulfones and diallenic sulfinyl sulfones are described. Both types of compound exhibit enhanced reactivity relative to their saturated counterparts, and react spontaneously at low temperature, upon preparation, to yield novel and functionalized bicyclic products. Possible mechanisms for their multi-step rearrangements are suggested.
Thermal rearrangements of bis-allenyl thiosulfonates. Synthesis of novel thienothiophene and thieno-oxathiine derivatives
作者:Mihail L. Birsa、Marina Cherkinsky、Samuel Braverman
DOI:10.1016/s0040-4039(02)02409-7
日期:2002.12
The synthesis and thermal rearrangement of bis-allenyl thiosulfonates are described. Bis-γ,γ-disubstituted allenyl thiosulfonates have been prepared by disproportionation of the corresponding allenesulfinic acids. On heating, these compounds unexpectedlyrearrange to a mixture of 1H,3H-thieno[3,4-d][1,2]oxathiine-3-oxide 8, 1H,3H-thieno[3,4-c]thiophene-2,2-dioxide 9, and 3-alkyl-4-alkenylthiophene