Photochromic and thermochromic spiranes. 34.* synthesis of photochromic 5-(4,5-diphenyl-1,3-oxazol-2-yl)-substituted spirobenzochromeneindolines
                                
                                    
                                        作者:N. A. Voloshin、A. V. Chernyshev、A. V. Metelitsa、V. I. Minkin                                    
                                    
                                        DOI:10.1007/s10593-011-0848-3
                                    
                                    
                                        日期:2011.10
                                    
                                    A simple and effective method is proposed for the synthesis of 4,5-diphenyloxazolyl-substituted o-hydroxynaphthaldehydes. Photochromic spirobenzochromeneindolines containing a 4,5-diphenyl-oxazole group at position 5 of the benzochromene fragment were obtained. In the cyclic form the new (diphenyloxazolyl)-substituted spiropyrans exhibit luminescent properties.