Crown-containing spirooxazines and spiropyrans: 1. Synthesis and the anion-"capped" complexes of photochromic aza-15-crown-5 ethers with flexible spacers

Article abstract of DOI:10.1007/BF02494754

Methods for the synthesis of new spironaphthooxazines containing an aza-15-crown-5 fragment in two different positions (5′ and 9′) were developed. The spectral and photochemical properties of these compounds suggest that two competitive complexation proce