Competition between cheletropic and homocheletropic additions of sulfur dioxide to 2,3,5,6-tetrakis(methylene)bicyclo[2.2.n]alkanes. Crystal and molecular structures of two 3-thiabicyclo[3.1.0]hexane 3,3-dioxide derivatives.
作者:Jean-Michel Roulet、Pierre Vogel、Frank Wiesemann、A.Alan Pinkerton
DOI:10.1016/0040-4020(94)01035-x
日期:1995.2
(26) (), whereas 28 was completely converted to the more stable bissulfolene 13,14-dimethylidene-4,10-dithiatetracyclo-[5.5.2.02,6.08,12]tetradeca-2(6),8(12)-diene 4,4,10,10-tetraoxide (29). Single crystal X-ray diffraction studies on 6,6-dimethyl-3-thiabicyclo[3.1.0]hexane 3,3-dioxide (4) and 6,11-dimethylidene-3-thiatetracyclo- [5.3.1.01,5.05,10]undec-8-ene 3,3-dioxide (12) revealed unusual bond elongations
在-20℃下,SO 2与7,7-二甲基[2.2.1]]烯(18)进行均相加成,得到(1R,5S)-6,10-二甲基-8-异亚丙基-3-噻吩四环[5.2]。 1.0 1,5 .0 5,9 ]癸烷3,3-二氧化物(21)。该环丁砜被异构化为(1R,7S)-8,9-二甲基亚乙基-10-异亚丙基-4-硫代三环[5.2.1.0 2,6 ] dec-2(6)-烯属4,4-二氧化物(22)。与SO 2的反应相反,在20°C的平衡比下,环丁砜比异构的环丁烯稍稳定。与2,3,5,6-四亚甲基双环[2.2.1]庚烷和5,6,7,8-四亚甲基双环[2.2.2]辛-2-烯。当2,3,5,6,7-五亚甲基双环[2.2.2]辛烷(19)和[2.2.2] her烯(20)与SO 2反应以首先生成相应的单亚砜(1SR,7RS)-8,9 ,10-三亚甲基-4-硫代三环[5.2.2.o 2,6 ] undec -2(6)-烯4