Nuclear isoprenylation of polyhydroxyacetophenones
作者:V.K. Ahluwalia、K.K. Arora
DOI:10.1016/s0040-4020(01)92463-9
日期:1981.1
A novel method of nuclear isoprenylation leading to the exclusive formation of 2,2-dimethylchromans has been achieved by the direct condensation of polyhydroxyacetophenones with isoprene in presence of phosphoric acid. Acetylchromans, thus obtained, are dehydrogenated with DDQ to given corresponding 2,2-dimethylchromenes. Using this method, synthesis of number of naturally occurring chromenes, viz