Preparation of 1,4,5,8-tetra-tert-butyl-1,3,5,7-cyclooctatetraene by twofold SO2 extrusion
作者:Jun Takayama、Yoshiaki Sugihara、Akihiko Ishii、Juzo Nakayama
DOI:10.1016/j.tetlet.2003.09.014
日期:2003.10
Oxidation of cis-1-transoid-1,2-cis-2-3,4,7,8-tetra-tert-butyl-9,10-dithiatricyclo[4.2.1.12,5]deca-3,7-diene 9,10-dioxide (2) by dimethyldioxirane gave the corresponding tetraoxide 4 quantitatively, which in turn provided 1,4,5,8-tetra-tert-butyl-1,3,5,7-cyclooctatetraene (6a) quantitatively by twofold thermal SO2 extrusion. The molecular structure of 6a is described on the basis of DFT calculations
的氧化的顺式-1- transoid -1,2-顺-2-3,4,7,8四-叔-丁基-9,10- dithiatricyclo [4.2.1.1 2,5 ]癸-3,7-二烯9,10-二氧化物(2)由二甲基二,得到相应的四氧化4定量,这又提供1,4,5,8-四-叔丁基- 1,3,5,7-环辛四烯(6A由双重)定量SO 2热挤压。6a的分子结构是根据DFT计算(B3LYP / 6-31G(d)水平)和X射线晶体学分析描述的。