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Volumn , Issue 20, 2006, Pages 3431-3434

Recyclization of hydrazides of 2-carboxyphenyldifurylmethanes: Synthesis of novel 4,10-dihydro-3H-pyridazino[1,6-b]isoquinolin-10-one system

Author keywords

Furans; Fused ring systems; Pyridazino 1,6 b isoquinolin 10 one; Ring closure; Ring opening

Indexed keywords

2 CARBOXYPHENYLDIFURYLMETHANE DERIVATIVE; 4,10 DIHYDRO 3H PYRIDAZINOL[1,6 B]ISOQUINOLIN 10 ONE; HYDRAZIDE DERIVATIVE; HYDRAZINE; ISOCOUMARIN DERIVATIVE; ISOQUINOLINE DERIVATIVE; KETONE DERIVATIVE; METHANE; UNCLASSIFIED DRUG;

EID: 33846485628     PISSN: 09365214     EISSN: None     Source Type: Journal    
DOI: 10.1055/s-2006-958419     Document Type: Article
Times cited : (7)

References (33)
  • 1
    • 77957077490 scopus 로고
    • For reviews, see: a
    • For reviews, see: (a) Dean, F. M. Adv. Heterocycl. Chem. 1982, 30, 167.
    • (1982) Adv. Heterocycl. Chem , vol.30 , pp. 167
    • Dean, F.M.1
  • 21
    • 33846481078 scopus 로고    scopus 로고
    • For a typical procedure, see: Johnstone, R. W. A, Rose, M. E. Tetrahedron 1979, 35, 2169. Preparation of Compounds 9a-f; General Procedure To a suspension of finely powdered KOH (2 g) in anhyd DMSO (40 mL) were added compound 8 (6.76 mmol) and MeI (2 mL, 12.12 mmol) and the mixture was stirred at r.t. for 20 min. The suspension was filtered off and the filtrate was poured into H2O (500 mL, The resulting emulsion was brought to pH 5-6 with dilute HCl and extracted with CH2Cl2 (4 × 30 mL, The combined extract was dried over anhyd Na2SO4 and evaporated to dryness. The residue was purified by flash chromatography on silica gel (hexane-CH2Cl 2, 10:1, Eluate containing the target compound was reduced in to 10-20 mL and left for crystallization at temperature below 0 °C. Selected analytical data of 9b: mp 57-58 °C. 1H NMR 300 MHz, CDCl
    • 4: C, 66.19; H, 4.97. Found: C, 66.01; H, 5.09.
  • 22
    • 33846527309 scopus 로고    scopus 로고
    • 2O (9 mL) and n-BuOH (9 mL) was refluxed for 20 min
    • The resulting precipitate was filtered off, air-dried and used in the next step as such
    • 2O (300 mL). The resulting precipitate was filtered off, air-dried and used in the next step as such.
    • 2O (300 mL)
  • 23
    • 33846512213 scopus 로고    scopus 로고
    • Preparation of Compounds 13a-f (Method A, General Procedure To a 15% solution of p-TsOH in benzene (20 mL, prepared by refluxing p-TsOH·H2O in benzene with azeotropic removal of H 2O, compound 10 (4.19 mmol) was added and the mixture was refluxed for 10 min. The resulting solution was poured into H2O (300 mL, The slurry was extracted with CH2Cl2 (3 × 50 mL, The combined extract was washed with H2O, dried over anhyd Na2SO4 and evaporated to dryness. The residue was purified by column chromatography on silica gel (hexane-EtOAc, 4:1, Solvent was stripped off of the eluate and the residue was recrystallized from hexane-EtOAc (10:1) at temperature below 0 °C. Selected analytical data of 13b: mp 173-174 °C. IR: 1667 (CO) cm-1. 1H NMR (300 MHz, CDCl3, δ, 2.33 (s, 3 H, CH3, 2.33 t, J, 7.5 Hz, 2 H, CH
    • 2: C, 66.16; H, 4.63. Found: C, 66.08; H, 4.69.
  • 31
    • 33846534145 scopus 로고    scopus 로고
    • 4 and evaporated to dryness. The residue was purified by column chromatography on silica gel (hexane-EtOAc, 4:1). The solvent was stripped off of the eluate and the residue was recrystallized from hexane-EtOAc (10:1) at temperature below 0 °C.
    • 4 and evaporated to dryness. The residue was purified by column chromatography on silica gel (hexane-EtOAc, 4:1). The solvent was stripped off of the eluate and the residue was recrystallized from hexane-EtOAc (10:1) at temperature below 0 °C.
  • 32
    • 33846517583 scopus 로고    scopus 로고
    • Crystal data of compound 13f: C18H15BrN 2O2, monoclinic, space group C2/c; a, 32.028(6) Å, b, 11.022(2) Å, c, 9.016(2) Å, α, 90°, β, 90.48(3)°, γ, 90°, V, 3182.6(11) Å3= 8, D calcd, 1.550 Mg/m3, F(000, 1504; 3330 reflections collected, 3116 unique (Rint, 0.0269, final R indices (3116 observed collections I > 2σI, R1, 0.0331, wR2, 0.0818; final R indices (all data, R1, 0.1677, wR2, 0.0945. Crystallographic data (excluding structure factors) for the structure in this article have been deposited with the Cambridge Crystallographic Data Centre as supplementary publication number CCDC 614755. Copies of the data can be obtained, free of charge, on application to CCDC, 12 Union Road, Cambridge CB2 1EZ, UK [fax: +44 (1223)336033 or E-mail: deposit@ccdc.cam.ac.uk, Each request s
    • 2 = 0.0945. Crystallographic data (excluding structure factors) for the structure in this article have been deposited with the Cambridge Crystallographic Data Centre as supplementary publication number CCDC 614755. Copies of the data can be obtained, free of charge, on application to CCDC, 12 Union Road, Cambridge CB2 1EZ, UK [fax: +44 (1223)336033 or E-mail: deposit@ccdc.cam.ac.uk]. Each request should be accompanied by the complete citation of this paper.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.