Unusual cope rearrangement of tricyclo[5.2.1.02,6]decadienone 2-carboxylic ester on acetalisation with ethylene glycol, PTSA
作者:Subhash P. Chavan、Krishna S. Ethiraj、Subhash K. Kamat
DOI:10.1016/0040-4039(96)01600-0
日期:1996.10
Protection of 2-exo-carbomethoxytricyclo[5.2.1.02,6] deca-3,8-dien-5-one with ethylene glycol, PTSA afforded the unexpected Cope rearranged product i.e. 1-carbomethoxy endo-dicyclopenta-1,4-diene-8-one 8-ethylene acetal, instead of protected acetal 2.
用乙二醇保护2-exo-carbomethoxytricyclo [5.2.1.0 2,6 ] deca-3,8-dien-5-one,PTSA提供了意想不到的Cope重排产物,即1-carbomethoxy内-dicyclopenta-1,4-diene -8一8乙缩醛,而不是受保护的乙缩醛2。