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 unexpectedly rearrange 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
描述了双烯基硫代磺酸盐的合成和热重排。双-γ,γ-二取代的烯丙基硫代磺酸盐已经通过歧化相应的烯丙基亚磺酸来制备。在加热时,这些化合物意外地重新排列为1的混合物ħ,3 ħ -噻吩并[3,4- d ] [1,2] oxathiine -3-氧化物8,1 ħ,3 ħ -噻吩并[3,4- Ç ]噻吩-2,2-二氧化物9和3-烷基-4-烯基噻吩10。建议的反应机制涉及顺序的sigmatropic重排和环化。