efficient reductive methylation of the tricyclic ketone in anhydrous ammonia provided the β,γ-unsaturated ketone in high yield which was subsequently converted into (±)-shonanyl methylether () and (±)-ferruginyl methylether ().
POTENTIAL INTERMEDIATES FOR DITERPENOID QUINONES: CRYPTOTANSHINONE, TANSHINONE IIA, AND MILTIRONE
作者:Ajoy K. Banerjee、José A. Azócar、María C. Sulbarán de Carrasco、Manuel Laya Mimó
DOI:10.1081/scc-100105126
日期:2001.1
ethers (1) and (11) to dimethyl tetraol (8) and tetrahydrophenanthrene (14) respectively is described. These compounds proved to be a useful building block for the synthesis of angularly fused diterpenoidquinones.