메뉴 건너뛰기




Volumn , Issue 11, 2008, Pages 1724-1728

Synthesis of enantioenriched N-aryl-2-pyridones with chiral C-N axes by rhodium-catalyzed [2+2+2] cycloaddition of alkynes with isocyanates

Author keywords

Alkynes; Cycloaddition; Isocyanates; Pyridones; Rhodium

Indexed keywords

ALKYNE DERIVATIVE; ISOCYANIC ACID DERIVATIVE; PYRIDONE DERIVATIVE; RHODIUM;

EID: 48249134040     PISSN: 09365214     EISSN: None     Source Type: Journal    
DOI: 10.1055/s-2008-1078488     Document Type: Article
Times cited : (72)

References (33)
  • 13
    • 33646462590 scopus 로고    scopus 로고
    • Synthesis of axially chiral N-aryl indoles by stereoselective nucleophilic aromatic substitution reactions of planar-chiral tricarbonyl(2,6-disubstituted-1 -fluorobenzene)chromium complexes, see: (a) Kamikawa, K.; Kinoshita, S.; Matsuzaka, H.; Uemura, S. Org. Lett. 2006, 8, 1097.
    • Synthesis of axially chiral N-aryl indoles by stereoselective nucleophilic aromatic substitution reactions of planar-chiral tricarbonyl(2,6-disubstituted-1 -fluorobenzene)chromium complexes, see: (a) Kamikawa, K.; Kinoshita, S.; Matsuzaka, H.; Uemura, S. Org. Lett. 2006, 8, 1097.
  • 19
    • 35048839171 scopus 로고    scopus 로고
    • +-xyl-BINAP-catalyzed concurrent construction of both C-C and C-N axial chiralities, see: Oppenheimer, J.; Hsung, R. P.; Figueroa, R.; Johnson, W. L. Org. Lett. 2007, 9, 3969.
    • +-xyl-BINAP-catalyzed concurrent construction of both C-C and C-N axial chiralities, see: Oppenheimer, J.; Hsung, R. P.; Figueroa, R.; Johnson, W. L. Org. Lett. 2007, 9, 3969.
  • 20
    • 34548173261 scopus 로고    scopus 로고
    • For our accounts, see: a
    • For our accounts, see: (a) Tanaka, K. Synlett 2007, 1977.
    • (2007) Synlett , pp. 1977
    • Tanaka, K.1
  • 22
    • 27144521700 scopus 로고    scopus 로고
    • +-modified-BINAP-catalyzed [2+2+2] cyclo-addition of alkynes with isocyanates, see: Tanaka, K.; Wada, A.; Noguchi, K. Org. Lett. 2005, 7, 4737.
    • +-modified-BINAP-catalyzed [2+2+2] cyclo-addition of alkynes with isocyanates, see: Tanaka, K.; Wada, A.; Noguchi, K. Org. Lett. 2005, 7, 4737.
  • 23
    • 33747789127 scopus 로고    scopus 로고
    • A neutral rhodium(I)-complex-catalyzed [2+2+2] cycloaddition of alkynes with isocyanates, see: Kondo, T.; Nomura, M.; Ura, Y.; Wada, K.; Mitsudo, T. Tetrahedron Lett. 2006, 47, 7107.
    • A neutral rhodium(I)-complex-catalyzed [2+2+2] cycloaddition of alkynes with isocyanates, see: Kondo, T.; Nomura, M.; Ura, Y.; Wada, K.; Mitsudo, T. Tetrahedron Lett. 2006, 47, 7107.
  • 24
    • 33644933863 scopus 로고    scopus 로고
    • Neutral rhodium(I)-complex-catalyzed enantioselective [2+2+2] cycloadditions of alkenyl isocyanates with alkynes, see: (a) Yu, R. T.; Rovis, T. J. Am. Chem. Soc. 2006, 128, 2782.
    • Neutral rhodium(I)-complex-catalyzed enantioselective [2+2+2] cycloadditions of alkenyl isocyanates with alkynes, see: (a) Yu, R. T.; Rovis, T. J. Am. Chem. Soc. 2006, 128, 2782.
  • 27
    • 34250653953 scopus 로고    scopus 로고
    • For recent reviews of pyridone synthesis by transitionmetal-catalyzed [2+2+2] cycloadditions, see: (a) Heller, B.; Hapke, M. Chem. Soc. Rev. 2007, 36, 1085.
    • For recent reviews of pyridone synthesis by transitionmetal-catalyzed [2+2+2] cycloadditions, see: (a) Heller, B.; Hapke, M. Chem. Soc. Rev. 2007, 36, 1085.
  • 31
    • 48249138958 scopus 로고    scopus 로고
    • General Procedure for the [2+2+2] Cycloaddition (Tables 2 and 3) Under an Ar atmosphere, a CH2Cl2 solution (0.5 mL) of (R)-BINAP (0.010-0.040 mmol, 5-20 mol, was added to a CH 2Cl2 solution (0.5 mL) of [Rh(cod)2]BF 4 (0.010-0.040 mmol, 5-20 mol, at r.t, and the mixture was stirred for 5 min. The resulting solution was stirred under H2 (1 atm) at r.t. for 1 h, concentrated to dryness, and dissolved in CH2Cl 2 (0.4 mL, To this solution was added a CH2Cl2 solution (0.7 mL) of 2 (0.220 mmol) and then a CH2Cl 2 solution (0.9 mL) of 1 (0.200 mmol) at r.t. After stirring at r.t. for 1-18 h, the resulting solution was concentrated and product 3 was isolated by a silica gel chromatography. Compound, )-3aa: colorless solid; mp 46.3-47.1 °C; [α]D25 +44.7 c 1.46, CHCl
    • R = 18.5 min (minor isomer) and 21.2 min (major isomer).
  • 32
    • 48249117022 scopus 로고    scopus 로고
    • The high enantioselectivity observed in the reaction of 1a with 2a might be ascribed to a larger steric hindrance of 2a than those of 2b and 2c.
    • The high enantioselectivity observed in the reaction of 1a with 2a might be ascribed to a larger steric hindrance of 2a than those of 2b and 2c.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.