906 VINGIELLO AND NEWALLIS VOL. 25 product IIb and one corresponding to cyclization into the position ortho to the chlorine substituent. Only the desired product, IIb, was obtained, albeit in low yields (26%). As expected, this cyclization into a ring containing a chlorine atom results in a marked decrease in yield. Similarly, cyclization of Id could be expected to result, in the formation of two products. Apparently this was the case, as a yield of 27% of a ...
