申请人:The Ohio State University
公开号:US08183365B2
公开(公告)日:2012-05-22
Methods are provided for preparing compounds of the general formula (I)
wherein X1 is an aryl hydrocarbon group optionally substituted with one or more groups independently selected from —R, —NH2, —NHR, —NR2, —OH, —OR, —F, —Cl, —Br, —I, —CF3, —C(═O)OH, —C(═O)OR, —C(═O)NH2, —C(═O)NHR, and —C(═O)NR2; X2 is —H, —R, —NHR, —NR2, —OR, —F, —Cl, —Br, or —I; and R is C1 to C10 hydrocarbyl. The methods comprise a double-dehydrogenation reaction step in which a functionalized aminohydroazepinone skeleton comprising an aminoimidazole ring is reacted with 2-iodoxybenzene to form the imidazo[4,5-d]azepine ring system present in formula (I). Example methods comprising the double-dehydrogenation reaction step are provided as efficient synthetic routes to ceratamine A, ceratamine B, and the des-methyl analogs thereof.
提供了制备通式(I)化合物的方法,其中X1是芳基烃基,可选地被一个或多个从-R,-NH2,-NHR,-NR2,-OH,-OR,-F,-Cl,-Br,-I,-CF3,-C(═O)OH,-C(═O)OR,-C(═O)NH2,-C(═O)NHR和-C(═O)NR2中独立选择的基团取代;X2是-H,-R,-NHR,-NR2,-OR,-F,-Cl,-Br或-I;R是C1到C10的烃基。该方法包括双脱氢反应步骤,其中将含有氨基咪唑环的功能化氨基羟烯酮骨架与2-碘苯氧基苯反应,形成通式(I)中存在的咪唑并[4,5-d]氮杂环系统。提供了包含双脱氢反应步骤的示例方法,作为制备角螺毒素A,角螺毒素B及其去甲基类似物的有效合成途径。