Photochromic Pyranopyridines and Pyranoquinolines

摘要

The synthesis of [3,2-c],[3,2-b]-2,2-dimethyl-2H-pyranopyridines,2,2-dimethyl-2H-quinolin-[1,2-b)]-pyran and (1'3'3'-trimethyl-2-norborane)-2,2'-spiro-2H-pyrano-[1,2-b]-quinoline via Claisen arrangement of propargylether,photochromism and photochemical behaviour are described.