70311-00-1Relevant articles and documents
Synthesis of photochromic spiroindolinopyrans with extended conjugation
Thakur, Sharmila K.,Hosangadi, Bhaskar D.
, p. 8755 - 8762 (1996)
Unsaturated side chains have been introduced in benzopyran site of parent indolinospiropyran moiety using Wittig reaction under conditions of Phase Transfer Catalysis in a one pot synthesis. The resultant unsaturated photochromic indolinospirobenzopyrans show significant bathochromic shift in the uv region of absorption spectra.