Cyclocondensation of methyl 12-aminodehydroabietate with aldehydes and cyclopentadiene. Synthesis of tricyclic diterpenoide fused to tetrahydroquinoline
摘要:
Three-component cyclocondensation of methyl 12-aminodehydroabietate with cyclopentadiene and formaldehyde or acetaldehyde under acid catalysis afforded polysubstituted naphthoquinoline derivatives with fused oxetanocyclopentane and cyclopentene fragments. Ozonation of the double bond in the N-trifluoroacetyl cyclopentene derivatives gave the corresponding ozonide.