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【结 构 式】

【分子编号】63612

【品名】methyl 4-[(4-ethyl-2,2-dimethyl-1,3-dioxolan-4-yl)methyl]-3-(phenylmethyl)-2,3,3a,4,5,7-hexahydro-1H-pyrrolo[2,3-d]carbazole-6-carboxylate

【CA登记号】

【 分 子 式 】C31H38N2O4

【 分 子 量 】502.6538

【元素组成】C 74.08% H 7.62% N 5.57% O 12.73%

与该中间体有关的原料药合成路线共 3 条

合成路线1

该中间体在本合成路线中的序号:(XI)

In an alternative synthesis, which does not utilize the alkaloid catharanthine, Sharpless asymmetric epoxidation of 2-ethyl-2-propenol (I) in the presence of ( )-diethyl tartrate provides (R)-2-ethyl-2,3-epoxypropanol (II). Subsequent addition of allylmagnesium chloride (III) to epoxide (II) leads to diol (IV), which is further protected as the corresponding acetonide (V) with 2,2 dimethoxypropane and p-TsOH. Ozonolysis of the terminal olefin (V) gives rise to aldehyde (VI). Condensation of aldehyde (VI) with the indoloazapine (VII) furnishes the bridged azepine (VIII) as a diastereomeric mixture. Without isolation, this mixture of amines is N-alkylated with benzyl bromide, and the resultant ammonium salts (IX) are subjected to rearrangement in boiling MeOH in the presence of Et3N to provide an equimolecular mixture of the tetracyclic diastereoisomers (X) and (XI) (5).

1 Kuehne, M.E.; Matson, P.A..; Bornmann, W.G.; Enantioselective syntheses of vinblastine, leurosidine, vincovaline, and 20'-epi-vincovaline. J Org Chem 1991, 56, 2, 513.
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) 63603 2-ethyl-2-propen-1-ol C5H10O 详情 详情
(II) 63604 (2-ethyl-2-oxiranyl)methanol C5H10O2 详情 详情
(III) 61128   C4H8 详情 详情
(IV) 63605 2-ethyl-5-hexene-1,2-diol C8H16O2 详情 详情
(V) 63606 4-(3-butenyl)-4-ethyl-2,2-dimethyl-1,3-dioxolane C11H20O2 详情 详情
(VI) 63607 3-(4-ethyl-2,2-dimethyl-1,3-dioxolan-4-yl)propanal C10H18O3 详情 详情
(VII) 63608 methyl 1,2,3,4,5,6-hexahydroazepino[4,5-b]indole-5-carboxylate C14H16N2O2 详情 详情
(VIII) 63609 methyl 15-{2-[(4S)-4-ethyl-2,2-dimethyl-1,3-dioxolan-4-yl]ethyl}-8,12-diazatetracyclo[10.2.1.0~1,9~.0~2,7~]pentadeca-2,4,6,9-tetraene-10-carboxylate C24H32N2O4 详情 详情
(IX) 63610 12-benzyl-15-{2-[(4S)-4-ethyl-2,2-dimethyl-1,3-dioxolan-4-yl]ethyl}-10-(methoxycarbonyl)-8-aza-12-azoniatetracyclo[10.2.1.0~1,9~.0~2,7~]pentadeca-2,4,6,9-tetraene bromide C31H39BrN2O4 详情 详情
(X) 63611 methyl 4-[(4-ethyl-2,2-dimethyl-1,3-dioxolan-4-yl)methyl]-3-(phenylmethyl)-2,3,3a,4,5,7-hexahydro-1H-pyrrolo[2,3-d]carbazole-6-carboxylate C31H38N2O4 详情 详情
(XI) 63612 methyl 4-[(4-ethyl-2,2-dimethyl-1,3-dioxolan-4-yl)methyl]-3-(phenylmethyl)-2,3,3a,4,5,7-hexahydro-1H-pyrrolo[2,3-d]carbazole-6-carboxylate C31H38N2O4 详情 详情

合成路线2

该中间体在本合成路线中的序号:(XI)

Acidic hydrolysis of the mixture of diastereoisomeric acetonides (X) and (XI) leads to the respective diols, which are then separated by flash chromatography. After selective tosylation of the primary hydroxyl group of isomer (XII) with p-toluenesulfonic anhydride, the remaining tertiary hydroxyl is protected by silylation with trimethylsilyl triflate to furnish (XIII). Chlorination of (XIII) with tert-butyl hypochlorite leads to (XIV), which is then coupled to vindoline (XV) in the presence of AgBF4 to afford the bis-indolyl derivative (XVI) (5).

1 Kuehne, M.E.; Matson, P.A..; Bornmann, W.G.; Enantioselective syntheses of vinblastine, leurosidine, vincovaline, and 20'-epi-vincovaline. J Org Chem 1991, 56, 2, 513.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(X) 63611 methyl 4-[(4-ethyl-2,2-dimethyl-1,3-dioxolan-4-yl)methyl]-3-(phenylmethyl)-2,3,3a,4,5,7-hexahydro-1H-pyrrolo[2,3-d]carbazole-6-carboxylate C31H38N2O4 详情 详情
(XI) 63612 methyl 4-[(4-ethyl-2,2-dimethyl-1,3-dioxolan-4-yl)methyl]-3-(phenylmethyl)-2,3,3a,4,5,7-hexahydro-1H-pyrrolo[2,3-d]carbazole-6-carboxylate C31H38N2O4 详情 详情
(XII) 63613 methyl 4-[2-hydroxy-2-(hydroxymethyl)butyl]-3-(phenylmethyl)-2,3,3a,4,5,7-hexahydro-1H-pyrrolo[2,3-d]carbazole-6-carboxylate C28H34N2O4 详情 详情
(XIII) 63614 methyl 4-{2-({[(4-methylphenyl)sulfonyl]oxy}methyl)-2-[(trimethylsilyl)oxy]butyl}-3-(phenylmethyl)-2,3,3a,4,5,7-hexahydro-1H-pyrrolo[2,3-d]carbazole-6-carboxylate C38H48N2O6SSi 详情 详情
(XIV) 63615 methyl 6-chloro-4-{2-({[(4-methylphenyl)sulfonyl]oxy}methyl)-2-[(trimethylsilyl)oxy]butyl}-3-(phenylmethyl)-2,3,3a,4,5,6-hexahydro-1H-pyrrolo[2,3-d]carbazole-6-carboxylate C38H47ClN2O6SSi 详情 详情
(XV) 63596 methyl 4-(acetyloxy)-3a-ethyl-5-hydroxy-6-methyl-8-(methyloxy)-3a,4,5,5a,6,11,12,13a-octahydro-1H-indolizino[8,1-cd]carbazole-5-carboxylate C25H32N2O6 详情 详情
(XVI) 63616 methyl 4-(acetyloxy)-3a-ethyl-5-hydroxy-6-methyl-8-(methyloxy)-9-[6-[(methyloxy)carbonyl]-4-{2-({[(4-methylphenyl)sulfonyl]oxy}methyl)-2-[(trimethylsilyl)oxy]butyl}-3-(phenylmethyl)-2,3,3a,4,5,6-hexahydro-1H-pyrrolo[2,3-d]carbazol-6-yl]-3a,4,5,5a,6, C63H78N4O12SSi 详情 详情

合成路线3

该中间体在本合成路线中的序号:(XI)

In an improved method for the preparation of intermediate (XI), indolodiazepine (I) is condensed with the chiral ferrocenylethyl acetate (II) to produce the N-alkylated compound (III) as an inseparable mixture of diastereoisomers. Subsequent condensation of (III) with aldehyde (IV) and rearrangement in refluxing benzene gives rise to the tetracyclic compound (V) as a single diastereoisomer. Acetolysis of (V) provides amine (VI) along with minor amounts of a partly epimerized compound, which can be removed by chromatography. Then, alkylation of (VI) with benzyl bromide yields the key synthetic intermediate (XI) (6).

1 Kuehne, M.E.; Bandarage, U.K.; An alternative enantioselective generation of intermediates in the total synthesis of vinblastine: Enantioselection in secodine-type reactions induced by alpha-ferrocenylethyl N-substituents. J Org Chem 1996, 61, 3, 1175.
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) 63608 methyl 1,2,3,4,5,6-hexahydroazepino[4,5-b]indole-5-carboxylate C14H16N2O2 详情 详情
(II) 63620   C26H25FeO2P 详情 详情
(III) 63621   C39H41N2O2P 详情 详情
(IV) 63607 3-(4-ethyl-2,2-dimethyl-1,3-dioxolan-4-yl)propanal C10H18O3 详情 详情
(V) 63622   C48H55FeN2O4P 详情 详情
(VI) 63623 methyl 4-[(4-ethyl-2,2-dimethyl-1,3-dioxolan-4-yl)methyl]-2,3,3a,4,5,7-hexahydro-1H-pyrrolo[2,3-d]carbazole-6-carboxylate C24H32N2O4 详情 详情
(XI) 63612 methyl 4-[(4-ethyl-2,2-dimethyl-1,3-dioxolan-4-yl)methyl]-3-(phenylmethyl)-2,3,3a,4,5,7-hexahydro-1H-pyrrolo[2,3-d]carbazole-6-carboxylate C31H38N2O4 详情 详情
Extended Information