First total synthesis of 19S-hydroxytacamine, an indole alkaloid from Tabernaemontana eglandulosa, and of its C-19 stereoisomer, 19R-hydroxytacamine
作者:Mauri Lounasmaa、David Din Belle、Arto Tolvanen
DOI:10.1016/s0040-4020(98)00921-1
日期:1998.12
19S-Hydroxytacamine (3) and 19R-hydroxytacamine (4) were prepared from cis hydroxyesters 7 and 8via corresponding O-TMS esters 9 and 22. Comparison of the spectral data of isomers 3 and 4 with those of 19-hydroxytacamine from Tabernaemontana eglandulosa confirms that isomer 3 represents the naturally occurring 19-hydroxytacamine.