... (7) Wadsworth, D. H.; Nuttall, RH; Weidner, CH, manuscript in preparation. 1986 American Chemical Society Page 2. 4640 J. Org. Chem., Vol. 51, No. 24, 1986 Wadsworth et al. Table I. Physical and Analytical Data for Diaryl(acy1oxy)indolizines (IV, VI)" R, COO i" ...