作者:Luis E. Elizalde、Gladys de los Santos、Aída E. García、Diana I. Medellín、Ricardo Acosta
DOI:10.1080/00397910500281044
日期:2005.12.1
Abstract The synthesis of four novel derivatives of 1′,3′,3′‐trimethylspiro‐[2H‐1]‐benzopyran‐6‐benzyloxo‐2,2′‐indoline is reported. The synthetic approach to these compounds involves the preparation of the key compound, 3‐formyl‐4‐hydroxybenzophenone, by means of the Reimer–Tiemann reaction. The photochromic compounds were isolated and characterized by 1H and 13C NMR as well as FT‐IR and UV‐VIS spectrometry
摘要 报道了 1',3',3'-trimethylspiro-[2H-1]-benzopyran-6-benzyloxo-2,2'-indoline 的四种新型衍生物的合成。这些化合物的合成方法包括通过 Reimer-Tiemann 反应制备关键化合物 3-甲酰基-4-羟基二苯甲酮。通过 1H 和 13C NMR 以及 FT-IR 和 UV-VIS 光谱法分离并表征了光致变色化合物。在这些化合物中进行的比较研究表明,当在螺苯并吡喃分子中引入苄氧基时,摩尔消光系数更高,最大吸收波长红移。