1-(4,6-dimethyl-2,3-dihydro-1H-indol-1-yl)-1-ethanone -Drug Synthesis Database

【结构式】

【分子编号】40797

【品名】1-(4,6-dimethyl-2,3-dihydro-1H-indol-1-yl)-1-ethanone

【CA登记号】

【分子式】C₁₂H₁₅NO

【分子量】189.25724

【元素组成】C 76.16% H 7.99% N 7.4% O 8.45%

与该中间体有关的原料药合成路线共 3 条

合成路线1 合成路线2 合成路线3

合成路线1

该中间体在本合成路线中的序号：(III)

The reduction of 4,6-dimethylindole (I) with NaBH3CN in AcOH produced indoline (II), which was acetylated with Ac2O to give amide (III). Introduction of a blocking group at position 5 of (III) was effected by bromination in AcOH, yielding (IV). Then, nitration of (IV) with HNO3/H2SO4 furnished the 7-nitroindoline (V). After basic hydrolysis of the acetamide group of (V), the resulting indoline (VI) was N-alkylated with n-pentyl bromide (VII) and NaH to afford (VIII). Reduction of the nitro group of (VIII) with simultaneous hydrogenolysis of the bromine atom was carried out by hydrogenation over Pd/C to produce amino indoline (IX). Finally, the title amide was obtained by coupling of (IX) with pivaloyl chloride in the presence of Et3N.

参考文献中间体

合成目标

【1】 Matsui, H.; Kamiya, S.; Shirahase, H.; Nakamura, S.; Wada, K. (Kyoto Pharmaceutical Industries, Ltd.); Novel heterocyclic derivs., process for producing the same, and medicinal use thereof. EP 0782986; JP 1996092210; US 5990150; WO 9609287 .

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)	40795	4,6-dimethyl-1H-indole		C₁₀H₁₁N	详情	详情
(II)	40796	4,6-dimethylindoline		C₁₀H₁₃N	详情	详情
(III)	40797	1-(4,6-dimethyl-2,3-dihydro-1H-indol-1-yl)-1-ethanone		C₁₂H₁₅NO	详情	详情
(IV)	40798	1-(5-bromo-4,6-dimethyl-2,3-dihydro-1H-indol-1-yl)-1-ethanone		C₁₂H₁₄BrNO	详情	详情
(V)	40799	1-(5-bromo-4,6-dimethyl-7-nitro-2,3-dihydro-1H-indol-1-yl)-1-ethanone		C₁₂H₁₃BrN₂O₃	详情	详情
(VI)	40800	5-bromo-4,6-dimethyl-7-nitroindoline		C₁₀H₁₁BrN₂O₂	详情	详情
(VII)	14460	1-bromopentane; n-Amyl Bromide	110-53-2	C₅H₁₁Br	详情	详情
(VIII)	40801	5-bromo-4,6-dimethyl-7-nitro-1-pentylindoline		C₁₅H₂₁BrN₂O₂	详情	详情
(IX)	40802	4,6-dimethyl-1-pentyl-2,3-dihydro-1H-indol-7-ylamine; 4,6-dimethyl-1-pentyl-7-indolinamine		C₁₅H₂₄N₂	详情	详情

合成路线2

该中间体在本合成路线中的序号：(III)

4,6-Dimethylindole (I) is reduced to the corresponding indoline (II) with NaBH3CN in AcOH. After acylation with Ac2O, the resultant N-acetylindoline (III) is brominated by means of Br2 in AcOH to give the 5-bromoindoline derivative (IV). Nitration of (IV) with fuming HNO3 in H2SO4/AcOH provides the 7-nitro indoline (V). Then, simultaneous debromination and nitro group reduction in (V) is accomplished by hydrogenation in the presence of Pd/C to furnish aniline (VI). Further acylation of (VI) with pivaloyl chloride leads to diamide (VII). The N-acetyl group of (VII) is selectively removed under alkaline hydrolysis conditions to yield indoline (VIII). Finally, alkylation of (VIII) with 1-bromodecane and K2CO3 furnishes the title compound.

参考文献中间体

合成目标

【1】 Yoshimi, A.; Kasai, M.; Shirahase, H.; Matsui, H.; Kanda, M.; Kurahashi, K.; Kamiya, S.; Takahashi, K.; Nakamura, S.; Bioavailable acyl-CoA: Cholesterol acyltransferase inhibitor with anti-peroxidative activity: Synthesis and biological activity of novel indolinyl amide and urea derivatives. Chem Pharm Bull 2000, 48, 6, 817.

中间体序号	中间体编号	品名	分子式	供应商	用于合成
(I)	40795	4,6-dimethyl-1H-indole	C₁₀H₁₁N	详情	详情
(II)	40796	4,6-dimethylindoline	C₁₀H₁₃N	详情	详情
(III)	40797	1-(4,6-dimethyl-2,3-dihydro-1H-indol-1-yl)-1-ethanone	C₁₂H₁₅NO	详情	详情
(IV)	40798	1-(5-bromo-4,6-dimethyl-2,3-dihydro-1H-indol-1-yl)-1-ethanone	C₁₂H₁₄BrNO	详情	详情
(V)	40799	1-(5-bromo-4,6-dimethyl-7-nitro-2,3-dihydro-1H-indol-1-yl)-1-ethanone	C₁₂H₁₃BrN₂O₃	详情	详情
(VI)	62806	1-(7-amino-4,6-dimethyl-2,3-dihydro-1H-indol-1-yl)-1-ethanone	C₁₂H₁₆N₂O	详情	详情
(VII)	62807	N-(1-acetyl-4,6-dimethyl-2,3-dihydro-1H-indol-7-yl)-2,2-dimethylpropanamide	C₁₇H₂₄N₂O₂	详情	详情
(VIII)	62808	N-(4,6-dimethyl-2,3-dihydro-1H-indol-7-yl)-2,2-dimethylpropanamide	C₁₅H₂₂N₂O	详情	详情

合成路线3

该中间体在本合成路线中的序号：(II)

Indole derivative (I) is converted into acetyl indoline (II) by first reduction with NaBH3CN in HOAc followed by acetylation with Ac2O in benzene or in CHCl3. Bromination of (II) with Br2 in HOAc yields derivative (III), which is then nitrated with fuming nitric acid in H2SO4/HOAc or with HNO3/Ac2O to afford nitroindoline (IV). Removal of the acetyl group of (IV) by means of NaOH or HCl in MeOH, followed by alkylation of the resulting indoline with NaH and octyl iodide (V) or octyl bromide (VI) in DMF, provides derivative (VII). Hydrogenation of (VII) over Pd/C in MeOH or benzene yields aminoindoline derivative (VIII), which is finally condensed with pivaloyl chloride (IX) in CHCl3 in the presence of Et3N to furnish the desired compound. Alternatively, conversion of (IV) into the target compound can be achieved as follows: Hydrogenation of the nitro moiety of (IV) over Pd/C in MeOH gives acetyl aminoindoline derivative (X), which is then coupled to pivaloyl chloride (IX) in CHCl3 in the presence of Et3N to afford derivative (XI). Finally, (XI) is hydrolyzed with NaOH in MeOH and the resulting secondary amide is condensed with octyl bromide (VI) in DMF in the presence of K2CO3.

参考文献中间体

合成目标

【1】 Matsui, H.; Kamiya, S.; Shirahase, H.; Nakamura, S.; Wada, K. (Kyoto Pharmaceutical Industries, Ltd.); Novel heterocyclic derivs., process for producing the same, and medicinal use thereof. EP 0782986; JP 1996092210; US 5990150; WO 9609287 .
【2】 Yoshimi, A.; Kasai, M.; Shirahase, H.; Matsui, H.; Kanda, M.; Kurahashi, K.; Kamiya, S.; Takahashi, K.; Nakamura, S.; Bioavailable acyl-CoA: Cholesterol acyltransferase inhibitor with anti-peroxidative activity: Synthesis and biological activity of novel indolinyl amide and urea derivatives. Chem Pharm Bull 2000, 48, 6, 817.

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)	40796	4,6-dimethylindoline		C₁₀H₁₃N	详情	详情
(II)	40797	1-(4,6-dimethyl-2,3-dihydro-1H-indol-1-yl)-1-ethanone		C₁₂H₁₅NO	详情	详情
(III)	40798	1-(5-bromo-4,6-dimethyl-2,3-dihydro-1H-indol-1-yl)-1-ethanone		C₁₂H₁₄BrNO	详情	详情
(IV)	40799	1-(5-bromo-4,6-dimethyl-7-nitro-2,3-dihydro-1H-indol-1-yl)-1-ethanone		C₁₂H₁₃BrN₂O₃	详情	详情
(V)	45901	1-heptyl-1lambda(3)-diiodane		C₇H₁₆I₂	详情	详情
(VI)	45902	bromo(heptyl)-lambda(3)-iodane		C₇H₁₆BrI	详情	详情
(VII)	45903	5-bromo-4,6-dimethyl-7-nitro-1-octylindoline		C₁₈H₂₇BrN₂O₂	详情	详情
(VIII)	45904	5-bromo-4,6-dimethyl-1-octyl-7-indolinamine; 5-bromo-4,6-dimethyl-1-octyl-2,3-dihydro-1H-indol-7-ylamine		C₁₈H₂₉BrN₂	详情	详情
(IX)	13597	2,2-Dimethylpropanoyl chloride; Pivaloyl chloride	3282-30-2	C₅H₉ClO	详情	详情
(X)	45905	1-(7-amino-5-bromo-4,6-dimethyl-2,3-dihydro-1H-indol-1-yl)-1-ethanone		C₁₂H₁₅BrN₂O	详情	详情
(XI)	45906	N-(1-acetyl-5-bromo-4,6-dimethyl-2,3-dihydro-1H-indol-7-yl)-2,2-dimethylpropanamide		C₁₇H₂₃BrN₂O₂	详情	详情

Extended Information