give 2-(2'-N-acetaminobenzoyl)-1,4-dimethoxynaphthalene, which, following deacylation, was subjected to Pschorr cyclization to give 1,3,7-trihydro-O,O-dimethylkinafluorenone. This was then demethylated, subjected to hydrazinolysis, and then oxidized with Fetizon's reagent to complete the synthesis. 1-Deoxy-3-demethylprekinamycin was synthesized from 3-bromo-1,5-dimethoxy-4-naphthol by an identical route
由
2-苄基-1,4-二甲氧基萘通过
硝酸铈铵氧化为2-苄基-对
萘醌,然后与
甲苯磺酰基
叠氮化物进行重氮转移,合成2-(重氮苄基)-对
萘醌。由
1,4-二甲氧基萘经
溴化,
锂化和与
乙腈缩合制得1,7-二甲氧基-3-脱甲基前激霉素,得到2-(2'-N-乙酰
氨基苯甲酰基)-
1,4-二甲氧基萘,在脱酰后,将其进行Pschorr环化,得到1,3,7-三氢-O,O-二甲基基
芴酮。然后将其脱甲基,进行
肼解,然后用Fetizon试剂氧化以完成合成。通过相同的路线,由3-溴-1,5-二甲氧基-4-
萘酚合成1-Deoxy-3-demethylprekinamycin。