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Volumn 5, Issue 25, 2003, Pages 4771-4774

Stereoselective Ring Opening of meso Bicyclic Hydrazines: A Straightforward Approach to Hydrazino Cyclopentenic Cores

Author keywords

[No Author keywords available]

Indexed keywords

ACID; ALLYL COMPOUND; BICYCLO COMPOUND; CYCLOPENTENE DERIVATIVE; HYDRAZINE DERIVATIVE; LIGAND; PALLADIUM;

EID: 0347683362     PISSN: 15237060     EISSN: None     Source Type: Journal    
DOI: 10.1021/ol0357393     Document Type: Article
Times cited : (59)

References (34)
  • 16
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    • For alternative routes to hydrazinocyclopentanes, see: (b) Tauh, P.; Fallis, A. G. J. Org. Chem. 1999, 64, 6960. (c) Marco-Contelles, J.; Rodriguez, M. Tetrahedron Lett. 1998, 39, 6749.
    • (1999) J. Org. Chem. , vol.64 , pp. 6960
    • Tauh, P.1    Fallis, A.G.2
  • 17
    • 0032505234 scopus 로고    scopus 로고
    • For alternative routes to hydrazinocyclopentanes, see: (b) Tauh, P.; Fallis, A. G. J. Org. Chem. 1999, 64, 6960. (c) Marco-Contelles, J.; Rodriguez, M. Tetrahedron Lett. 1998, 39, 6749.
    • (1998) Tetrahedron Lett. , vol.39 , pp. 6749
    • Marco-Contelles, J.1    Rodriguez, M.2
  • 18
    • 0034598038 scopus 로고    scopus 로고
    • WO 96/4068
    • Although an impressive number of carbocyclic nucleosides syntheses have been described, reports on the preparation of such derivatives bearing pyrazoles or fused heterocyclic pyrazoles are scarce; see ref 7 and: Bhagwat, S.; Cowart, M. D. WO 96/4068. For examples of the usefulness of hydrazinocyclopentanes in the synthesis of bioactive compounds, see: Kuang, R.; Ganguly, A. K.; Chan, T.-M.; Pramanik, B. N.; Blythin, D. J.; McPhail, A. T.; Saksena, A. K. Tetrahedron Lett. 2000, 41, 9575 and references therein.
    • Bhagwat, S.1    Cowart, M.D.2
  • 19
    • 0034598038 scopus 로고    scopus 로고
    • and references therein
    • Although an impressive number of carbocyclic nucleosides syntheses have been described, reports on the preparation of such derivatives bearing pyrazoles or fused heterocyclic pyrazoles are scarce; see ref 7 and: Bhagwat, S.; Cowart, M. D. WO 96/4068. For examples of the usefulness of hydrazinocyclopentanes in the synthesis of bioactive compounds, see: Kuang, R.; Ganguly, A. K.; Chan, T.-M.; Pramanik, B. N.; Blythin, D. J.; McPhail, A. T.; Saksena, A. K. Tetrahedron Lett. 2000, 41, 9575 and references therein.
    • (2000) Tetrahedron Lett. , vol.41 , pp. 9575
    • Kuang, R.1    Ganguly, A.K.2    Chan, T.-M.3    Pramanik, B.N.4    Blythin, D.J.5    McPhail, A.T.6    Saksena, A.K.7
  • 23
    • 0347858127 scopus 로고    scopus 로고
    • note
    • 2, 125 μL, 0.125 mmol) was added, and the mixture was stirred at room temperature for 2 h. Water (2 mL) was added next, and the organic layer was separated and concentrated. Purification by flash chromatography (cyclohexane/ethyl acetate = 70/30) afforded rac-6 as a colorless oil (50 mg, 73%).
  • 27
    • 0035901642 scopus 로고    scopus 로고
    • From allylic aziridines: Aggarwal, V. K.; Alonso, E.; Fang, G.; Ferrara, M.; Hynd, G.; Porcelloni, M. Angew. Chem., Int. Ed. 2001, 40, 1433. From azabicyclic substrates: (a) Katagiri, N.; Takebayashi, M.; Kokufuda, H.; Kaneko, C.; Kanehira, K.; Torihara, M. J. Org. Chem. 1997, 62, 2, 1580. Other metal-catalyzed enantioselective ring openings of azabicyclic derivatives have also been described, but consideration of their stereo- and regioselectivity led the authors to propose a mechanism not involving π-allyl species: (b) Lautens, M.; Hiebert, S.; Renaud, J.-L. Org. Lett. 2000, 2, 1971. (c) Lautens, M.; Fagnou, K.; Hiebert, S. Acc. Chem. Res. 2003, 36, 48.
    • (2001) Angew. Chem., Int. Ed. , vol.40 , pp. 1433
    • Aggarwal, V.K.1    Alonso, E.2    Fang, G.3    Ferrara, M.4    Hynd, G.5    Porcelloni, M.6
  • 28
    • 0346598068 scopus 로고    scopus 로고
    • From allylic aziridines: Aggarwal, V. K.; Alonso, E.; Fang, G.; Ferrara, M.; Hynd, G.; Porcelloni, M. Angew. Chem., Int. Ed. 2001, 40, 1433. From azabicyclic substrates: (a) Katagiri, N.; Takebayashi, M.; Kokufuda, H.; Kaneko, C.; Kanehira, K.; Torihara, M. J. Org. Chem. 1997, 62, 2, 1580. Other metal-catalyzed enantioselective ring openings of azabicyclic derivatives have also been described, but consideration of their stereo- and regioselectivity led the authors to propose a mechanism not involving π-allyl species: (b) Lautens, M.; Hiebert, S.; Renaud, J.-L. Org. Lett. 2000, 2, 1971. (c) Lautens, M.; Fagnou, K.; Hiebert, S. Acc. Chem. Res. 2003, 36, 48.
    • (1997) J. Org. Chem. , vol.62 , pp. 2
    • Katagiri, N.1    Takebayashi, M.2    Kokufuda, H.3    Kaneko, C.4    Kanehira, K.5    Torihara, M.6
  • 29
    • 0000563324 scopus 로고    scopus 로고
    • From allylic aziridines: Aggarwal, V. K.; Alonso, E.; Fang, G.; Ferrara, M.; Hynd, G.; Porcelloni, M. Angew. Chem., Int. Ed. 2001, 40, 1433. From azabicyclic substrates: (a) Katagiri, N.; Takebayashi, M.; Kokufuda, H.; Kaneko, C.; Kanehira, K.; Torihara, M. J. Org. Chem. 1997, 62, 2, 1580. Other metal-catalyzed enantioselective ring openings of azabicyclic derivatives have also been described, but consideration of their stereo- and regioselectivity led the authors to propose a mechanism not involving π-allyl species: (b) Lautens, M.; Hiebert, S.; Renaud, J.-L. Org. Lett. 2000, 2, 1971. (c) Lautens, M.; Fagnou, K.; Hiebert, S. Acc. Chem. Res. 2003, 36, 48.
    • (2000) Org. Lett. , vol.2 , pp. 1971
    • Lautens, M.1    Hiebert, S.2    Renaud, J.-L.3
  • 30
    • 0037239379 scopus 로고    scopus 로고
    • From allylic aziridines: Aggarwal, V. K.; Alonso, E.; Fang, G.; Ferrara, M.; Hynd, G.; Porcelloni, M. Angew. Chem., Int. Ed. 2001, 40, 1433. From azabicyclic substrates: (a) Katagiri, N.; Takebayashi, M.; Kokufuda, H.; Kaneko, C.; Kanehira, K.; Torihara, M. J. Org. Chem. 1997, 62, 2, 1580. Other metal-catalyzed enantioselective ring openings of azabicyclic derivatives have also been described, but consideration of their stereo- and regioselectivity led the authors to propose a mechanism not involving π-allyl species: (b) Lautens, M.; Hiebert, S.; Renaud, J.-L. Org. Lett. 2000, 2, 1971. (c) Lautens, M.; Fagnou, K.; Hiebert, S. Acc. Chem. Res. 2003, 36, 48.
    • (2003) Acc. Chem. Res. , vol.36 , pp. 48
    • Lautens, M.1    Fagnou, K.2    Hiebert, S.3
  • 31
    • 0346598066 scopus 로고    scopus 로고
    • note
    • dppf: 1,1′-bis-(diphenylphosphino)ferrocene.
  • 32
    • 0347227932 scopus 로고    scopus 로고
    • note
    • 2 (2.3 mg, 0.0063 mmol) and 1,1′-bis-(diphenylphosphino)-ferrocene (9.5 mg, 0.017 mmol) were placed in a Schlenk tube, dried under vacuum (0.1 mmHg) for 1 h, and then placed under argon. Freshly distilled THF (3 mL) was degassed and then added to the mixture at room temperature. The yellow solution was stirred for 30 min. 4 (96 mg, 0.26 mmol) and phenol (127.5 mg, 1.35 mmol) dissolved in THF (1 mL) were added. Next, NaH (60% dispersion in mineral oil, 8.1 mg, 0.2 mmol) was added and the solution was stirred at room temperature until TLC analysis indicated full conversion. After dilution with diethyl ether (5 mL), the mixture was washed with sodium hydroxide (1 M, 2 x 5 mL) and brine (5 mL) and concentrated. Purification by flash chromatography (cyclohexane/ethyl acetate = gradient) afforded 8a as a slowly crystallizing white solid (100 mg, 83%).
  • 33
    • 0346598064 scopus 로고    scopus 로고
    • note
    • See Supporting Information. PHOX: 2-[2(diphenylphosphino)-phenyl]-4- phenyl-4,5-dihydrooxazole. No conversion was obtained when using the classical Trost ligand 1,2-diaminocyclohexane-N,N′-bis(2′-diphenyl- phosphinobenzoyl).


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