SRC="/isubscribe/journals/orlef7/10/i04/figures/ol703037qn00001.gif" ALIGN="left" HSPACE=5> |
The reaction of alkynyl Fi
scher carbene
s and i
sobenzofuran
s give
s ri
se to the corre
sponding [4 + 2] cycloadduct
s. The newly formed carbeneadduct
s are
suitable for benzannulation proce
sse
s in the pre
sence of
tert-butyli
socyanide or carbon monoxide to yield a variety of new highly
sub
stituted polycyclic
structure
s having the anthraquinone framework. The whole two-
step proce
ss i
s conducted in a one-pot fa
shion fromea
sily available 1,4-dihydro-1,4-epoxynaphthalene
s.