Abstract:
The present invention relates to substituted furo[3,2-b]pyridine compounds of formula I: or a pharmaceutical acid addition salt thereof; where; R is EâD is C CH or CHâCH ; R is hydrogen or C -C alkyl; R is hydrogen, halo, hydroxy, âNR R , âSR , âC(O)R , âC(O)MR R , âNR SO R , âNHC(Q)NR R , âNHC(O)OR , or âNR C(O)R ; R , R , and R are independently hydrogen, C -C alkyl, C -C alkenyl, C -C alkynyl, or â(CH ) aryl; or R and R combine, together with the nitrogen to which they are attached, form a pyrrolidine, piperidine, piperazine, 4-substituted piperazine, morpholine, or thiomorpholine ring; n is 0, 1, 2, 3, 4, 5, or 6; and Q is O or S. The present invention further relates to pharmaceutical. formulations containing compounds formula I and to the use of compounds of formula I for activating 5-HT receptors, inhibiting neuronal protein extravasation, and treating and/or preventing migraine in a mammal.