作者:Peter Yates、E. M. Levi、B. L. Shapiro
DOI:10.1139/v74-494
日期:1974.10.1
monoazine. Analogous phototropic products are formed on reaction of p-anisil monoazine and p-tolil monoazine with sodium methoxide. Reduction of the azines to the phototropic products may occur by cleavage to α-keto imine anions followed by their dimerization; such a pathway can also account for the formation of the cleavage products. Alternatively, reduction may proceed by hydride or electron transfer;
用甲醇钠处理苄基单嗪得到 5-甲氧基-1,2,5-三苯基-3,4-二氮杂-2,4-戊二烯-1-酮 (2), 5-苯甲酰基-4,5-二氢-3 ,4,5-triphenylpyrazol-4-ol (3) 和简单的裂解产物。化合物3水解为3,4,5-三苯基吡唑和苯甲酸。它是向光性的,在暴露于阳光下时可逆地转化为红色产物,该产物很容易自氧化为苄基单嗪。对苯甲醚单嗪和对甲苯基单嗪与甲醇钠反应会形成类似的光致产物。通过裂解为 α-酮亚胺阴离子,然后将它们二聚化,可以将吖嗪还原为光致产物;这种途径也可以解释裂解产物的形成。或者,可以通过氢化物或电子转移进行还原;通过观察到用叔丁醇钾处理对甲苯里单嗪也得到相应的光致产物,确定了氢化物转移不一定涉及。它是提议...