The lithiation of phenothiazine when protected as the lithium salt of its  carbamate occurs exclusively at the C-1 carbon atom. Reaction of the  lithiated species with a variety of electrophiles readily produced several  new 1-substituted phenothiazines, as well as a number of known  compounds in superior yield to existing methods.
                                    吩噻嗪作为
氨基甲酸酯的
锂盐受到保护时,其
锂化作用只发生在 C-1 碳原子上。
锂化产物与多种亲电体反应后,很容易生成几种新的 1-取代
吩噻嗪以及一些已知化合物,其产量优于现有方法。