A method of making an oxochlorin comprises the steps of oxidizing a chlorin to produce a mixture of hydroxychlorin and oxochlorin, and then oxidizing the hydroxychlorin in said mixture, preferably with DDQ, to produce a mixture consisting essentially of oxochlorin. The step of oxidizing a chlorin is carried out by exposing the chlorin to alumina, typically in the presence of an oxidizing agent such as air or alumina. The oxidizing steps may be carried out in an organic solvent such as toluene. The chlorin is preferably a C-methylated chlorin, and is preferably metalated.
制备氧代叶菌素的方法包括以下步骤:将叶菌素氧化以产生羟基叶菌素和氧代叶菌素的混合物,然后将所述混合物中的羟基叶菌素氧化,优选地使用
DDQ,以产生基本上由氧代叶菌素组成的混合物。氧化叶菌素的步骤是通过将叶菌素暴露于氧化剂(例如空气或氧化铝)的存在下的氧化铝中进行的。氧化步骤可以在有机溶剂(例如
甲苯)中进行。叶菌素最好是C-甲基化的叶菌素,并且最好是
金属化的。