申请人:Board of Regents, University of Nebraska-Lincoln
公开号:US05200513A1
公开(公告)日:1993-04-06
To produce doxorubicin and its analogues methyl 3alpha, 5alpha-dihydroxy-5beta-(trimethylsilylethynyl)-2alpha-nitromethylcyclohexa ne-1beta-carboxylate acetonide is condensed with 1,4-dihydro-4,4,5-trimethoxy-1-oxonaphthalene in the presence of 1,8-diazabicyclo-[5.4.0]undec-7-ene in an aprotic solvent to produce 3-[ (2beta-carbomethoxy-4beta-ethynyl-4alpha, 6alpha-(di-O-isopropylidenyl)cyclohexanyl-1-yl]-nitromethyl-4,4,5-trimetho xy-1-oxo-1,2,3,4-tetrahydronaphthalene; which is cyclized to produce 9beta-ethynyl-12-hydroxy-7alpha,9alpha-(di-O-isopropylidenyl)-6-nitro-4,5, 5-trimethoxy-5,5a,6,6a,7,8,9,10,10a,11-decahydro -11-naphthacenone. The decahydro-11-naphthacenone is converted to 7alpha-9alpha,(di-O-isopropyl-idenyl)-4,5-dimethoxy-9beta-ethynyl-12-hydro xy-6-nitro-6,6a,7,8,9,10,10a,11-octahydro-11, -naphthacenone. The octahydro-11-naphthacenone is oxidized to 7alpha-9alpha, (di-O-isopropyl-idenyl)-9beta-ethynyl-11-hydroxy-4-methoxy-6-nitro-7,8,9,1 0,-tetrahydro-5,12-naphthacenedione which is converted to 6-desoxy-6-nitrodaunomycinone, daunomycinone and related 6-substituted analogues of daunomycinone.
将多柔比星及其类似物甲基3α,5α-二羟基-5β-(三甲基硅乙炔基)-2α-硝基甲基环己烷-1β-羧酸乙酰缩合与1,4-二氢-4,4,5-三甲氧基-1-氧基萘醌在无水溶剂中与1,8-二氮杂双环[5.4.0]十一烯存在下反应,生成3-[(2β-羧甲氧基-4β-乙炔基-4α,6α-(二-O-异丙基亚甲基环己基-1-基]-硝基甲基-4,4,5-三甲氧基-1-氧基-1,2,3,4-四氢萘醌;然后环化生成9β-乙炔基-12-羟基-7α,9α-(二-O-异丙基亚甲基)-6-硝基-4,5,5-三甲氧基-5,5a,6,6a,7,8,9,10,10a,11-十氢-11-萘酮。将十氢-11-萘酮转化为7α-9α,(二-O-异丙基亚甲基)-4,5-二甲氧基-9β-乙炔基-12-羟基-6-硝基-6,6a,7,8,9,10,10a,11-八氢-11-萘酮。将八氢-11-萘酮氧化为7α-9α,(二-O-异丙基亚甲基)-9β-乙炔基-11-羟基-4-甲氧基-6-硝基-7,8,9,10-四氢-5,12-萘醌,然后转化为6-去氧-6-硝基多柔红霉素酮、多柔红霉素酮及相关的多柔红霉素酮的6-取代类似物。