Key Word Index--Glycosmis pentaphylla; Rutaceae; C18 carbazole alkaloids; mupamine; partial synthesis.Abstract--A carbazole alkaloid with a C-18 carbon skeleton from Glycosmis pentaphylla has been characterized as mupamine by new partial synthesis.
Total synthesis of 7- and 8-oxygenated pyrano[3,2-a]carbazole and pyrano[2,3-a]carbazole alkaloids via boronic acid-catalyzed annulation of the pyran ring
The boronic acid-catalyzed annulation of citral opens up a short route to oxygenated cyclized monoterpenoid pyranocarbazole alkaloids. Thus, murrayamine-D is available in only three steps and 55% overall yield from the corresponding carbazole precursor.