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【结 构 式】 
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【分子编号】48877 【品名】N-benzyl-2-(5-fluoro-2-methyl-1H-inden-3-yl)acetamide 【CA登记号】 |
【 分 子 式 】C19H18FNO 【 分 子 量 】295.3564632 【元素组成】C 77.27% H 6.14% F 6.43% N 4.74% O 5.42% |
合成路线1
该中间体在本合成路线中的序号：(XII)Heating p-fluorobenzaldehyde (I) with propionic anhydride (II) in the presence of sodium propionate affords methyl cinnamic acid derivative (III), which is then hydrogenated over Pd/C in EtOH to provide methyl hydrocinnamic acid derivative (IV). Ring closure of (IV) is then performed by heating with polyphosphoric acid to yield methylindanone derivative (V). Condensation of (V) with cyanoacetic acid (VI) by means of ammonium acetate and HOAc in refluxing toluene, followed by treatment with KOH in refluxing EtOH, provides acetic acid derivative (VII), which is then condensed with 3,4,5-trimethoxybenzaldehyde (VIII) by heating with NaOMe in MeOH to give substituted benzylidene derivative (IX). The target product can be finally obtained either by direct condensation of (IX) with benzylamine (XI) by means of DMAP and EDC in DMA or by first conversion of (IX) into the corresponding acetyl chloride by reaction with oxalyl chloride in refluxing THF, followed by coupling with benzylamine (XI) in CH2Cl2. Alternatively, the desired compound can also be obtained by coupling of acetic acid derivative (VII) with benzylamine (XI) by means of DMAP, EDC in DMA to afford N-benzyl acetamide derivative (XII), followed by condensation with 3,4,5-trimethoxybenzaldehyde (VIII) by heating with NaOMe in MeOH.
| 【1】 Sperl, G.; Gross, P.; Brendel, K.; Pamucku, R.; Piazza, G.A. (University of Arizona); Substd. benzylidene indenyl formamides, acetamides and propionamides. WO 9747303 . |
| 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) | 12337 | 4-fluorobenzaldehyde | 459-57-4 | C7H5FO | 详情 | 详情 |
| (II) | 20095 | propionic anhydride | 123-62-6 | C6H10O3 | 详情 | 详情 |
| (III) | 48870 | (Z)-3-(4-fluorophenyl)-2-methyl-2-propenoic acid | C10H9FO2 | 详情 | 详情 | |
| (IV) | 48871 | 3-(4-fluorophenyl)-2-methylpropionic acid | C10H11FO2 | 详情 | 详情 | |
| (V) | 48872 | 6-Fluoro-2-methylindanone | C10H9FO | 详情 | 详情 | |
| (VI) | 48873 | 2-Oxopropionitrile; Acetylcyanide; Pyruvonitrile | C3H3NO | 详情 | 详情 | |
| (VII) | 48874 | 2-(5-fluoro-2-methyl-1H-inden-3-yl)acetic acid | C12H11FO2 | 详情 | 详情 | |
| (VIII) | 11136 | 3,4,5-Trimethoxybenzaldehyde | 86-81-7 | C10H12O4 | 详情 | 详情 |
| (IX) | 48875 | 2-[5-fluoro-2-methyl-1-[(E)-(3,4,5-trimethoxyphenyl)methylidene]-1H-inden-3-yl]acetic acid | C22H21FO5 | 详情 | 详情 | |
| (X) | 48876 | 2-[5-fluoro-2-methyl-1-[(E)-(3,4,5-trimethoxyphenyl)methylidene]-1H-inden-3-yl]acetyl chloride | C22H20ClFO4 | 详情 | 详情 | |
| (XI) | 15147 | Benzylamine; Phenylmethanamine | 100-46-9 | C7H9N | 详情 | 详情 |
| (XII) | 48877 | N-benzyl-2-(5-fluoro-2-methyl-1H-inden-3-yl)acetamide | C19H18FNO | 详情 | 详情 |
合成路线2
该中间体在本合成路线中的序号：(X)Heating p-fluorobenzaldehyde (I) with propionic anhydride (II) in the presence of sodium propionate affords methyl cinnamic acid derivative (III), which is then hydrogenated over Pd/C in EtOH to provide methyl hydrocinnamic acid derivative (IV). Ring closure of (IV) is then performed by heating with polyphosphoric acid to yield methylindanone derivative (V). Condensation of (V) with cyanoacetic acid (VI) by means of ammonium acetate and HOAc in refluxing toluene followed by treatment with KOH in refluxing EtOH provides acetic acid derivative (VII), which is then converted into acetyl chloride compound (VIII) by reaction with oxalyl chloride in refluxing THF. Coupling of (VIII) with benzylamine (IX) in refluxing CH2Cl2 gives indenylacetamide derivative (X), which is finally condensed with 4-pyridinecarboxaldehyde (XI) by means of NaOMe in MeOH to furnish the desired compound.
| 【1】 Piazza, G.; Gross, P.; Brendel, K.; Sperl, G.; Pamukcu, R. (Cell Pathways, Inc.; University of Arizona); N-Benzyl-3-indenylacetamides derivs. for treating neoplasia. EP 1044187; US 5948779; US 6066634; WO 9931065 . |
| 【2】 Mayle, M.J.; Menander, K.B. (Cell Pathways, Inc.); A method for treating patients with acne by administering a cyclic GMP PDE inhibitor. WO 0044372 . |
| 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) | 12337 | 4-fluorobenzaldehyde | 459-57-4 | C7H5FO | 详情 | 详情 |
| (II) | 20095 | propionic anhydride | 123-62-6 | C6H10O3 | 详情 | 详情 |
| (III) | 48870 | (Z)-3-(4-fluorophenyl)-2-methyl-2-propenoic acid | C10H9FO2 | 详情 | 详情 | |
| (IV) | 48871 | 3-(4-fluorophenyl)-2-methylpropionic acid | C10H11FO2 | 详情 | 详情 | |
| (V) | 48872 | 6-Fluoro-2-methylindanone | C10H9FO | 详情 | 详情 | |
| (VI) | 48873 | 2-Oxopropionitrile; Acetylcyanide; Pyruvonitrile | C3H3NO | 详情 | 详情 | |
| (VII) | 48874 | 2-(5-fluoro-2-methyl-1H-inden-3-yl)acetic acid | C12H11FO2 | 详情 | 详情 | |
| (VIII) | 48878 | 2-(5-fluoro-2-methyl-1H-inden-3-yl)acetyl chloride | C12H10ClFO | 详情 | 详情 | |
| (IX) | 15147 | Benzylamine; Phenylmethanamine | 100-46-9 | C7H9N | 详情 | 详情 |
| (X) | 48877 | N-benzyl-2-(5-fluoro-2-methyl-1H-inden-3-yl)acetamide | C19H18FNO | 详情 | 详情 | |
| (XI) | 17203 | 4-Pyridinecarboxaldehyde; isonicotinaldehyde | 872-85-5 | C6H5NO | 详情 | 详情 |