Synthesis of disubstituted homodiamantanes by acylative ring expansion using benzoyl trifluoromethanesulfonate

Diamantane is a hydrocarbon whose carbon framework is a part of diamond lattices. Acylative ring expansion of land 4-diamanatanecarbaldehydes u ing benzoyl trifluoromethanesulfonate and trifluoromethanesulfonic acid yielded 10-hydroxyhomodiamant-9-yl benzoate and 7-hydroxyhomodiamant-8-yl benzoateo whose skeletal sffuctures are sttme as pentacyclo[8.3.1.fJt.gzJ.geJzy tetradecane. Synhe ofDisubs e IIomodiam byAcylativeRingExpans Using Benzo Trifluorometha T Okaza ,Shus Mada,Tos a Kitagawa,adKen-ichiTdke