[GRAPHICS]
In the course of natural product synthetic studies, 5-(4-pentenyl)oxazole a
nd 5-(5-hexenyl)oxazole were N-methylated. The initial N-methylated 5-alken
yloxazolium salt adducts were found to be only intermediates and were ultim
ately transformed into hydroindole and hydroisoquinoline compounds, respect
ively.