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Volumn , Issue 12, 2009, Pages 1955-1958

Studies on fluorinated annulated nicotines: Concise synthesis of cis-4,4-difluoro-2,3,3a,4,5,9b-hexahydro-1-methyl-1H-pyrrolo[2,3-f]quinoline

Author keywords

Fluorinated; Intramolecular azomethine ylide alkene 3+2 cycloaddition; Nicotine analogue; Rigid conformation

Indexed keywords

3 BROMO 3,3 DIFLUOROPROPENE; 4,4 DIFLUORO 2,3,3A 4,5,9B HEXAHYDRO 1 METHYL 1H PYRROLO [2,3 F] QUINOLINE; 6,6,5 TRICYCLIC DIFLUORINATED NICOTINE DERIVATIVE; AZOMETHINE YLIDE; CARBENE; DIFLUOROMETHYLENE; INDIUM; NICOTINE DERIVATIVE; PROPYLENE; QUINOLINE; UNCLASSIFIED DRUG;

EID: 67651204137     PISSN: 09365214     EISSN: 14372096     Source Type: Journal    
DOI: 10.1055/s-0029-1217519     Document Type: Article
Times cited : (6)

References (55)
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    • The reagent, 3-bromo-3,3-difluoropropene, is available from the TCI Company, although we obtained it as a gift from Professors G. Zhao and F.-L. Qing of the Shanghai Institute of Organic Chemistry (see also Acknowledgment).
    • The reagent, 3-bromo-3,3-difluoropropene, is available from the TCI Company, although we obtained it as a gift from Professors G. Zhao and F.-L. Qing of the Shanghai Institute of Organic Chemistry (see also Acknowledgment).
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    • Preparation of New Compounds Compound 5 Indium powder (67 mg, 0.58 mmol) and 3-bromo-3,3-difluoropropene (70 μL, 0.72 mmol) were added sequentially to a solution of 4 (94 mg, 0.45 mmol) in DMF (3 mL, The mixture was then sonicated for 3 h. After evaporation of DMF under reduced pressure, sat. aq NaHCO3 soln and EtOAc were added. The two layers were separated, and the aqueous layer was further extracted with EtOAc. The combined organic layers were dried (Na2SO4, filtered, and concentrated to give a residue, which was chromatographed (EtOAc-PE, 1:5) to afford 5 (100 mg, 78, as a colorless oil: 1H NMR (300 MHz, CDCl3, δ, 1.16 (t, J, 9.2 Hz, 3 H, 1.27 (t, J, 9.9 Hz, 3 H, 3.36-3.50 (m, 2 H, 3.54-3.65 (m, 1 H, 3.74-3.82 (m, 1 H, 4.99 (d, J, 9.6 Hz, 1 H, 5.36-5.45 (m, 1 H, 5.49 (d, J, 11.1 Hz, 1 H, 5.61-5.69 (m, 1 H, 5.88 (s, 1 H, 5.92-6.02 (m, 1 H, 7.31 dd
    • 3 soln and the mixture was extracted with EtOAc.


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