The synthesis of a number of 2-anilino- and 2-(benzoylamino)-β-carbolin-3-ones
in good yields by a one-step sequence from the reaction of pyranoindolones
with phenylhydrazine or benzoylhydrazine is described; the observed
good regioselectivity of the reaction is discussed. Full assignment
of all ¹H and ¹³C
NMR chemical shifts has been unambiguously achieved.
benzoylhydrazine -
p-benzylic
coupling - bisnucleophiles - one-pot reaction - phenylhydrazine - pyranoindoles