1-Phenylisobenzofuran, 1-phenylnaphtho[2,3-c]furan, 1-phenylnaphtho[1,2-c]furan, and 3-phenylnaphtho[1,2-c]furan via cyclic hemiaminal, hemiacetal, and acetal precursors
1-Phenylisobenzofuran, 1-phenylnaphtho[2,3-c]furan, 1-phenylnaphtho[1,2-c]furan, and 3-phenylnaphtho[1,2-c]furan via cyclic hemiaminal, hemiacetal, and acetal precursors