Spiropyrans and spirooxazines 3.~*Synthesis of photochromic 5'-(4,5-diphenyl-l,3-oxazol-2-yl)-spiro[indoline-2,3 -naphtho[2,3-6]pyran]

摘要

The reaction of 2-hydroxy-3-(4,5-diphenyl-l,3-oxazol-2-yl)-l-naphthaldehyde with l,2,3,3-tetramethyl-3H-indolium perchiorate afforded photochromic spirolindoline-2,3'-naphthopyran] containing a 4,5-diphenyloxazole group in position 5' of the naphtho-pyran fragment.The merocyanine form of the spiropyran gave complexes with bivalent heavy cations.