| 摘要 |
NEW MATERIAL:A compound expressed by the formula (R1 represents 1-8C alkyl, allyl 1-5C alkyl, 1-10C alkenyl, etc.; R2-R9 represent group as defined for R1, H, 5-10C alicyclic ring in combination with an adjacent group, etc.; R10 represents H, 1-18C alkyl, allyl 1-5C alkyl, etc.: R11-R16 represent H, 1-9C alkyl, 1-5C alkoxyl, etc.). EXAMPLE:1,3,3-Trimethylspiropiperidine-2,3'-[3H]-naphth[2,1-b]-1,4-oxa zine. USE:A material for an automatically light-controllable plastic sun glass, etc., having photochromic property of good repeatability. PREPARATION:For example, 1-nitroso-2-naphthol, etc., is reacted with 1,2,3,3- tetramethyl-3,4,5,6-tetrahydropyridinium iodide, etc., in a solvent such as anhydrous ethyl alcohol in the presence of triethylamine, etc., to obtain the exemplified compound. |
