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【结 构 式】

【药物名称】Rishirilide B

【化学名称】(+)-(1R*,2R*,3R*)-1,2,8-Trihydroxy-3-methyl-1-(3-methylbutyl)-4-oxo-1,2,3,4-tetrahydroanthracene-2-carboxylic acid

【CA登记号】93361-67-2

【 分 子 式 】C21H24O6

【 分 子 量 】372.42183

【开发单位】Otsuka (Originator)

【药理作用】Coagulation Disorders Therapy, HEMATOLOGIC DRUGS, Thrombolytics

合成路线1

The cyclization of acetoacetic ester (I) with crotonaldehyde (II) by means of Na and 2-(trimethylsilyl)ethanol (A) in ethyl ether gives the cyclohexenone carboxylic ester (III), which is hydroxylated by means of NaH, Tbdms-OTf and dimethyldioxirane (DMDO) in DMF, yielding the alpha-hydroxy compound (IV). The bromination of (IV) with NBS and AIBN, followed by treatment with Ag2CO3 in acetone/water, affords the diol (V), which is oxidized with DMP to the cyclohexenedione (VI). The cyclization of (VI) with benzocyclobutane (VII) in hot toluene provides the tricyclic dione (VIII), which is aromatized by means of CSA in pyridine/MeOH, furnishing the dihydroanthraquinone (IX). The Grignard condensation of (IX) with isoamylmagnesium bromide (X) in THF gives the adduct (XI), which is finally desilylated by means of TAS-F in THF.

1 Danishefsky, S.J.; Allen, J.G.; The total synthesis of (±)-rishirilide B. J Am Chem Soc 2001, 123, 2, 351.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(A) 20323 2-(trimethylsilyl)-1-ethanol 2916-68-9 C5H14OSi 详情 详情
(I) 45600 2-(trimethylsilyl)ethyl 3-oxobutanoate C9H18O3Si 详情 详情
(II) 22517 (E)-2-butenal 4170-30-3 C4H6O 详情 详情
(III) 45601 2-(trimethylsilyl)ethyl 6-methyl-2-oxo-3-cyclohexene-1-carboxylate 367-57-7 C13H22O3Si 详情 详情
(IV) 45602 2-(trimethylsilyl)ethyl (1R,6S)-1-hydroxy-6-methyl-2-oxo-3-cyclohexene-1-carboxylate C13H22O4Si 详情 详情
(V) 45603 2-(trimethylsilyl)ethyl (1R,6S)-1,5-dihydroxy-6-methyl-2-oxo-3-cyclohexene-1-carboxylate C13H22O5Si 详情 详情
(VI) 45604 2-(trimethylsilyl)ethyl (1R,6R)-1-hydroxy-6-methyl-2,5-dioxo-3-cyclohexene-1-carboxylate C13H20O5Si 详情 详情
(VII) 45605 (7R)-2,8-bis[[tert-butyl(dimethyl)silyl]oxy]bicyclo[4.2.0]octa-1,3,5-trien-7-yl tert-butyl(dimethyl)silyl ether; [((7R)-2,8-bis[[tert-butyl(dimethyl)silyl]oxy]bicyclo[4.2.0]octa-1,3,5-trien-7-yl)oxy](tert-butyl)dimethylsilane C26H50O3Si3 详情 详情
(VIII) 45606 2-(trimethylsilyl)ethyl (2R,3R,4aS,9R,9aR,10S)-8,9,10-tris[[tert-butyl(dimethyl)silyl]oxy]-2-hydroxy-3-methyl-1,4-dioxo-1,2,3,4,4a,9,9a,10-octahydro-2-anthracenecarboxylate C39H70O8Si4 详情 详情
(IX) 45607 2-(trimethylsilyl)ethyl (2R,3R)-8-[[tert-butyl(dimethyl)silyl]oxy]-2-hydroxy-3-methyl-1,4-dioxo-1,2,3,4-tetrahydro-2-anthracenecarboxylate C27H38O6Si2 详情 详情
(X) 13532 Bromo(isopentyl)magnesium C5H11BrMg 详情 详情
(XI) 45608 2-(trimethylsilyl)ethyl (1R,2R,3R)-8-[[tert-butyl(dimethyl)silyl]oxy]-1,2-dihydroxy-1-isopentyl-3-methyl-4-oxo-1,2,3,4-tetrahydro-2-anthracenecarboxylate C32H50O6Si2 详情 详情
Extended Information