Influence of the protecting groups on the syn/anti stereoselectivity of boron aldol additions with erythrulose derivatives. A theoretical and experimental study
作者:Juan Murga、Eva Falomir、Florenci González、Miguel Carda、J.A Marco
DOI:10.1016/s0040-4020(02)01279-6
日期:2002.11
of protected l-erythrulose derivatives mediated by dicyclohexyl boron chloride. The syn/anti stereoselectivity has been found to depend on the type of protecting groups on the hydroxyl functions at C-3 and C-4. Thus, erythruloses benzylated at these hydroxyl groups gave only syn aldols while the corresponding benzoylatedderivatives gave anti aldols under the same reaction conditions. The resident chirality