螺[4 H-茚并[1,2 - b ]吡啶-4,3 ′-[3 H ]吲哚]和螺[ ac ] -1(2 H),4′-[4 H -茚并[1,2- b ]吡啶]是通过茚满-1,3-二酮,1,3-二羰基化合物,靛红(= 1 H-吲哚-2,3-二酮)或1,2据报道,在催化量的吡啶存在下,二甲苯和AcONH 4在回流的甲苯中。
l-Proline was found to be a versatile organocatalyst for the synthesis of new spirooxindole derivatives in good yields under mild reaction conditions using 1-propanol as a solvent.