Reaction of 1,2,3,4,5,6,7-(heptamethoxycarbonyl)cyclohepta-2,4,6-trien-1-yl potassium with tropylium tetrafluoroborate to form cage structures
摘要:
A new original route to the construction of cage structures containing seven or more electron-withdrawing groups in a molecule was elaborated. This method is based on the reaction of a tropylium cation with a cycloheptatrienyl anion totally substituted with methoxycarbonyl groups. After the formation of a C-C bond between two different seven-membered carbocycles, some further transformations take place to give 2,3,4,5,6,7,8-hepta(methoxycarbonyl)pentacyclo[7.5.0.0(2.4).0(3.8).0(5.14)]tetradeca-7,10,12-triene (6). Low temperature NMR experiments for the formation of this compound and some of its reactions were also studied. (C) 2013 Elsevier Ltd. All rights reserved.
Reaction of 1,2,3,4,5,6,7-(heptamethoxycarbonyl)cyclohepta-2,4,6-trien-1-yl potassium with tropylium tetrafluoroborate to form cage structures
摘要:
A new original route to the construction of cage structures containing seven or more electron-withdrawing groups in a molecule was elaborated. This method is based on the reaction of a tropylium cation with a cycloheptatrienyl anion totally substituted with methoxycarbonyl groups. After the formation of a C-C bond between two different seven-membered carbocycles, some further transformations take place to give 2,3,4,5,6,7,8-hepta(methoxycarbonyl)pentacyclo[7.5.0.0(2.4).0(3.8).0(5.14)]tetradeca-7,10,12-triene (6). Low temperature NMR experiments for the formation of this compound and some of its reactions were also studied. (C) 2013 Elsevier Ltd. All rights reserved.
Reaction of 1,2,3,4,5,6,7-(heptamethoxycarbonyl)cyclohepta-2,4,6-trien-1-yl potassium with tropylium tetrafluoroborate to form cage structures
作者:Yury V. Tomilov、Dmitry N. Platonov、Evgeny V. Shulishov、Galina P. Okonnishnikova
DOI:10.1016/j.tet.2013.06.033
日期:2013.8
A new original route to the construction of cage structures containing seven or more electron-withdrawing groups in a molecule was elaborated. This method is based on the reaction of a tropylium cation with a cycloheptatrienyl anion totally substituted with methoxycarbonyl groups. After the formation of a C-C bond between two different seven-membered carbocycles, some further transformations take place to give 2,3,4,5,6,7,8-hepta(methoxycarbonyl)pentacyclo[7.5.0.0(2.4).0(3.8).0(5.14)]tetradeca-7,10,12-triene (6). Low temperature NMR experiments for the formation of this compound and some of its reactions were also studied. (C) 2013 Elsevier Ltd. All rights reserved.