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Volumn , Issue 1, 2008, Pages 0077-0082

Microwave-enhanced Fischer reaction: An efficient one-pot synthesis of γ-carbolines

Author keywords

carbolines; Arylhydrazine hydrochloride; Fischer reaction; Microwave irradiation; N acetyl 3 bromo 4 piperidone hydrobromide

Indexed keywords

BROMINE DERIVATIVE; GAMMA CARBOLINE DERIVATIVE; N ACETYL 3 BROMO 4 PIPERIDONE HYDROBROMIDE; UNCLASSIFIED DRUG;

EID: 38549164636     PISSN: 09365214     EISSN: None     Source Type: Journal    
DOI: 10.1055/s-2007-992411     Document Type: Article
Times cited : (20)

References (30)
  • 4
    • 84986341442 scopus 로고
    • Takeuchi, T, Nitta, K, Tanaka, N, Eds, Japan Scientific Press: Tokyo
    • Acramone, F.; Penco, S. Antitumor Natural Products; Takeuchi, T.; Nitta, K.; Tanaka, N., Eds.; Japan Scientific Press: Tokyo, 1989, 1.
    • (1989) Antitumor Natural Products , pp. 1
    • Acramone, F.1    Penco, S.2
  • 15
  • 27
    • 38549106832 scopus 로고    scopus 로고
    • General Procedure for the Conventional Synthesis of γ-Carbolines 5 A mixture of N-acetyl-3-bromo-4-piperidone hydrobromide 6 (1 mmol; prepared according to ref.18) and substituted arylhydrazine hydrochloride 7 (1.5 mmol) in 5 mL glacial AcOH or BF3· OEt was stirred and refluxed for 12 h. After cooling down, the mixture was neutralized with aq Na2CO3 and extracted with EtOAc (3 x 20 mL, The extract was dried over anhyd Na2SO4 and concentrated in vacuo to give crude product, which was further purified by silica column chromatography (using different ratio of PE-EtOAc-EtOH as eluent according to different products, General Procedure for the Microwave-Assisted Synthesis of γ-Carbolines 5 A mixture of N-acetyl-3-bromo-4-piperidone hydrobromide (6, 1 mmol) and substituted arylhydrazine hydrochloride 7 (1.5 mmol) was placed in a microwave test tube 10
    • 3·OEt. The test tube was placed in the microwave cavity (Initiator™ 2.0, Biotage, 400 W, 2450 MHz) and subjected to microwave irradiation at 230°C for 5 min. After completion of the reaction, the tube was removed and cooled to r.t. The following workup and purification of the crude product was quite the same as above.
  • 28
    • 38549145694 scopus 로고    scopus 로고
    • All compounds gave satisfactory analytical and spectral data. Data for selected compounds are as follows: 6-Bromo-γ-carboline (5f, white powder; mp 282-283°C (PE-EtOAc-EtOH, 1H NMR (400 MHz, DMSO-d6, δ, 11.87 (s, NH, 9.38 (s, 1 H, 8.50 (d, J, 1.6 Hz, 1 H, 8.45 (d, J, 5.6 Hz, 1 H, 7.61 (dd, J, 8.8, 1.6 Hz, 1 H, 7.54 (d, J, 8.8 Hz, 1 H, 7.49 (d, J, 5.6 Hz, 1 H, 13C NMR (100 MHz, DMSO-d6, δ, 144.8, 144.0, 143.2, 138.4, 129.1, 123.3, 122.7, 118.6, 113.5, 112.2, 106.7. ESI-MS: m/z, 247 [M, 1, Anal. Calcd for C11H 7BrN2: C, 53.47; H, 2.86; N, 11.34. Found: C, 53.57; H, 2.67; N, 11.23. 8-Chloro-γ-carboline (5h, white powder; mp 219-220°C (PE-EtOAc-EtOH, 1H NMR (400 MHz, DMSO-d 6, δ, 12.15 (br s, NH, 9.38 (s, 1 H, 8.48 d, J, 5.6 Hz, 1 H
    • 2: C, 65.20; H, 3.48; N, 13.82. Found: C, 65.25; H, 3.25; N, 13.89.
  • 29
    • 38549085007 scopus 로고    scopus 로고
    • Ishikawa, M.; Koike, H. JP 10147571, 1998.
    • (a) Ishikawa, M.; Koike, H. JP 10147571, 1998.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.