申请人:——
公开号:US04145536A1
公开(公告)日:1979-03-20
Photochromic compounds of the general formula: ##STR1## in which X represents oxygen or NR.sub.6, R.sub.6 being hydrogen, alkyl, aryl or aralkyl, R.sub.1 represents hydrogen, alkyl, aryl, or aralkyl, Y and Y.sub.1 being the same or different represent hydrogen, alkyl, halogen, or alkoxy, Z represents hydrogen, halogen, alkyl, alkoxy, or aryloxy R.sub.5 represents hydrogen, alkyl, alkoxy, or aryloxy, R.sub.4 represents alkyl or aryl, and R.sub.2 and R.sub.3 represent the same or different alkyl, aralkyl or aryl groups or one of R.sub.2 and R.sub.3 represents hydrogen and the other is alkyl, aralkyl, or aryl, and with the proviso that when Z or Y is alkoxy or aryloxy, R.sub.1 is other than hydrogen.
通式为:##STR1##的光致变色化合物,其中X代表氧或NR.sub.6,R.sub.6为氢、烷基、芳基或芳烷基,R.sub.1代表氢、烷基、芳基或芳烷基,Y和Y.sub.1相同或不同,代表氢、烷基、卤素或烷氧基,Z代表氢、卤素、烷基、烷氧基或芳氧基,R.sub.5代表氢、烷基、烷氧基或芳氧基,R.sub.4代表烷基或芳基,R.sub.2和R.sub.3相同或不同,代表烷基、芳烷基或芳基,或者R.sub.2和R.sub.3中的一个代表氢,另一个代表烷基、芳烷基或芳基,但当Z或Y为烷氧基或芳氧基时,R.sub.1不为氢。