Formylation of photochromic 9′-hydroxy-1,3,3-trimethyl-1,3-dihydrospiro[2H-indole-2,3′-3′H-naphtho[2,1-b][1,4]oxazine] with the paraformaldehyde-MgCl2-Et3N system or by the Reimer-Tiemann reaction proceeds at the ortho-position to the hydroxy group to form 10′-formyl derivative.
用
乙醇铝和
氯化镁的体系或通过Reimer-Tiemann反应对光变色的9′-羟基-1,3,3-三甲基-1,3-二氢螺[
2H-吲哚-2,3′-3′H-
萘[2,1-b][1,4]噁嗪]进行甲酰化反应,在羟基的邻位进行,形成10′-甲酰衍
生物。