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【结 构 式】

【分子编号】48775

【品名】1-ethoxyvinyl 2-chloroacetate

【CA登记号】

【 分 子 式 】C6H9ClO3

【 分 子 量 】164.58836

【元素组成】C 43.79% H 5.51% Cl 21.54% O 29.16%

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:(XXIV)

The reaction of carbaldehyde (VII) with phenylsulfanylacetylene (XVII) by means of LiHMDS in toluene gives the intermediate lithium alcoxide (XVIII), which is condensed with benzoyl chloride (XIX) to yield the ester (XX). The migration of the aroyl group of (XX) to the methyl ketone group under basic medium (LiHMDS) affords diketone (XXI), which is oxidized with DMP, complexed with Co2(CO)8 and debenzylated, providing the cobalt complex (XXII). The cycloaddition of (XXII) by means of Me2SiCl2, chloranil in refluxing toluene, followed by protection of the peri-OH groups with tBu2Si(OTf)2 and oxidation of the sulfanyl group with MCPBA, gives the polycyclic spiro compound (XXIII). The reaction of (XXIII) with chloroacetate (XXIV) by means of Ts-OH yields the chloroacetoxy compound (XXV). Selective demethylation of (XXV) with trimethylsilyl iodide affords the pyridinone (XXVI), which is oxidized with SeO2 in dioxane to provide the carbaldehyde (XXVII). The condensation of (XXVII) with phosphonium bromide (XXVIII) by means of BuLi in THF furnishes the alkylated precursor (XXIX), which is finally deprotected by means of BBr3 in dichloromethane and oxidized by air to afford the target compound.

1 Kita, Y.; et al.; Total synthesis of the antitumor antribiotic (±)-fredericamycin A by a linear approach. Chemistry (Weinheim) 2000, 6, 21, 3897.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(VII) 48761 8-acetyl-1,9-dimethoxy-3-methyl-7,8-dihydro-6H-cyclopenta[g]isoquinoline-8-carbaldehyde C18H19NO4 详情 详情
(XVII) 48768 ethynyl phenyl sulfide; 1-(ethynylsulfanyl)benzene C8H6S 详情 详情
(XVIII) 48769   C26H24LiNO4S 详情 详情
(XIX) 48770 2-(benzyloxy)-4,5-dimethoxybenzoyl chloride C16H15ClO4 详情 详情
(XX) 48771 1-(8-acetyl-1,9-dimethoxy-3-methyl-7,8-dihydro-6H-cyclopenta[g]isoquinolin-8-yl)-3-(phenylsulfanyl)-2-propynyl 2-(benzyloxy)-4,5-dimethoxybenzoate C42H39NO8S 详情 详情
(XXI) 48772 1-[2-(benzyloxy)-4,5-dimethoxyphenyl]-3-[8-[1-hydroxy-3-(phenylsulfanyl)-2-propynyl]-1,9-dimethoxy-3-methyl-7,8-dihydro-6H-cyclopenta[g]isoquinolin-8-yl]-1,3-propanedione C42H39NO8S 详情 详情
(XXII) 48773 1-[1,9-dimethoxy-3-methyl-8-[3-(phenylsulfanyl)-2-propynoyl]-7,8-dihydro-6H-cyclopenta[g]isoquinolin-8-yl]-3-(2-hydroxy-4,5-dimethoxyphenyl)-1,3-propanedione C35H31NO8S 详情 详情
(XXIII) 48774   C44H45NO9S 详情 详情
(XXIV) 48775 1-ethoxyvinyl 2-chloroacetate C6H9ClO3 详情 详情
(XXV) 48776   C40H42ClNO10 详情 详情
(XXVI) 48777   C39H40ClNO10 详情 详情
(XXVII) 48778   C39H38ClNO11 详情 详情
(XXVIII) 48753 (E)-2-butenyl(triphenyl)phosphonium bromide C22H22BrP 详情 详情
(XXIX) 48779   C43H44ClNO10 详情 详情
Extended Information