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【结 构 式】

【分子编号】42501

【品名】ethyl (Z)-4-ethoxy-2-oxo-3-pentenoate

【CA登记号】

【 分 子 式 】C9H14O4

【 分 子 量 】186.20776

【元素组成】C 58.05% H 7.58% O 34.37%

与该中间体有关的原料药合成路线共 1 条

合成路线1

该中间体在本合成路线中的序号:(II)

Total synthesis: Reaction of ethyl acetopyruvate (I) with triethyl orthoformate gives compound (II), which is then treated with cyanoacetamide to yield 3-cyano-4-methyl-6-(carbethoxy)-2(1H)-pyridone (III). The reaction of (III) with methyl acrylate (A) gives compound (IV), which is sequentially submitted to decarboxylation, ketalization and treatment with diethylcarbonate, giving the functionalized tetrahydroindolizine (V). Ethylation of (V) followed by reduction in the presence of acetic anhydride gives the amide (VI), which is reacted with sodium nitrite, refluxed in CCl4, hydrolyzed and acidified to give the tricyclic compound (VII). The DIBAL reduction of (VII) and subsequent elimination of the hydroxyl group gives the cyclic enol ether (VIII). Asymmetric dihydroxylation of compound (VIII) with (DHQD)2PHAL, K2OsO4 and K3Fe(CN)6 in t-BuOH gives the diol (IX). The oxidation and deketalization of compound (IX) gives (S)-hydroxylactone (X). Finally, Friedlander condensation of the lactone (X) with 3-[N-isopropyl-N-(carbobenzyloxy)amino]-1-(2-aminophenyl)propan-1-one (B) followed by deprotection gives CKD-602.

1 Hong, C.I.; Kim, J.K.; Ahn, S.K.; CKD-602. Drugs Fut 2000, 25, 12, 1243.
2 Kim, J.M.; Jew, S.; Kim, M.G.; Kim, H.-J.; Hah, J.M.; Ok, K.; Cho, Y.; Enantioselective synthesis of 20(S)-camptothecin using sharpless catalytic asymmetric dihydroxylation. Tetrahedron Asymmetry 1995, 6, 6, 1245.
3 Jew, S.-S.; Kim, H.-J.; Kim, M.G.; et al.; Synthesis and antitumor activity of 7-substituted 20(RS)-camptothecin analogues. Bioorg Med Chem Lett 1996, 6, 7, 845.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(I) 42500 ethyl 2,4-dioxopentanoate 615-79-2 C7H10O4 详情 详情
(II) 42501 ethyl (Z)-4-ethoxy-2-oxo-3-pentenoate C9H14O4 详情 详情
(III) 15637 ethyl 5-cyano-4-methyl-6-oxo-1,6-dihydro-2-pyridinecarboxylate C10H10N2O3 详情 详情
(IV) 14156 methyl acrylate 96-33-3 C4H6O2 详情 详情
(V) 15639 methyl 6-cyano-1-hydroxy-7-methyl-5-oxo-3,5-dihydro-2-indolizinecarboxylate C12H10N2O4 详情 详情
(VI) 15642 2-[6'-Cyano-5'-oxo-1',2',3',5'-tetrahydrospiro[1,3-dixolane-2,1'-indolizin]-7'-yl]acetic acid ethyl ester C15H16N2O5 详情 详情
(VII) 15644 2-[6'-(Acetamidomethyl)-5'-oxo-1',2',3',5'-tetrahydrospiro[1,3-dixolane-2,1'-indolizin]-7'-yl]butyric acid ethyl ester C19H26N2O6 详情 详情
(VIII) 42502   C15H17NO5 详情 详情
(IX) 42503   C15H17NO4 详情 详情
(X) 42504   C15H19NO6 详情 详情
(XI) 10841 (4S)-4-Ethyl-4-hydroxy-7,8-dihydro-1H-pyrano[3,4-f]indolizine-3,6,10(4H)-trione C13H13NO5 详情 详情
(XII) 42505 benzyl 3-(2-aminophenyl)-3-oxopropyl(isopropyl)carbamate C20H24N2O3 详情 详情
Extended Information