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Volumn 47, Issue 29, 2006, Pages 5127-5130

Total and formal enantioselective synthesis of lyngbic acid and hermitamides A and B

Author keywords

[No Author keywords available]

Indexed keywords

4 PENTENOIC ACID; ALCOHOL DERIVATIVE; ALKENE DERIVATIVE; AMIDE; BACTERIAL PROTEIN; CAMPHOR; HERMITAMIDE A; HERMITAMIDE B; IMMUNOSUPPRESSIVE AGENT; LYNGBIC ACID; UNCLASSIFIED DRUG;

EID: 33745044740     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.tetlet.2006.05.078     Document Type: Article
Times cited : (28)

References (51)
  • 26
    • 33745025846 scopus 로고    scopus 로고
    • note
    • Synthesis of lyngbic acid 1a: To a solution of 4-methoxyundec-1-ene (460 mg, 2.5 mmol) and 4-pentenoic acid 6 (0.051 mL, 0.5 mmol) in dichloromethane (5 mL) was added second generation Grubbs' catalyst (11 mg). The mixture was heated to 40 °C for 7 h. A second portion of Grubbs' catalyst was then added and the mixture was kept warm for 16 h. The solvent was evaporated under reduced pressure and the residue was purified by flash-chromatography on silica (hexanes/AcOEt = 90/10). Acid 1a was obtained as a colorless oil (108 mg, 84%).
  • 31
    • 33745056101 scopus 로고    scopus 로고
    • Pearson A.J., and Roush W.J. (Eds), John Wiley, Chichester
    • Urch C.J. In: Pearson A.J., and Roush W.J. (Eds). Handbook of Reagents for Organic Synthesis (1999), John Wiley, Chichester 418-419
    • (1999) Handbook of Reagents for Organic Synthesis , pp. 418-419
    • Urch, C.J.1
  • 33
    • 33745028493 scopus 로고    scopus 로고
    • note
    • 4, filtered off, and concentrated under vacuo. After purification by flash-chromatography (hexanes/AcOEt, 50/50), 10 was isolated pure as a beige powder (545 mg, 75%).
  • 47
    • 33745014692 scopus 로고    scopus 로고
    • note
    • Preparation of (S)-undec-1-en-4-ol 7: To a solution of camphor-derived allylic alcohol (9.6 g, 50 mmol) and camphor sulfonic acid (395 mg, 1.7 mmol) in dichloromethane (17 mL), was added octanal (2.13 g, 16.6 mmol). The solution was stirred at room temperature for 18 h then concentrated under reduced pressure. The residue was purified by flash-chromatography on silica (hexanes/AcOEt, 95/5) to give 7 as a colorless liquid (2.02 g, 72%, 86% ee).
  • 48
    • 33745011233 scopus 로고    scopus 로고
    • Bargiggia, F. Ph.D. Thesis, Université de Lyon I, 2001.
  • 50
    • 33745031682 scopus 로고    scopus 로고
    • note
    • To a solution of (S)-undec-1-en-4-ol (60 mg, 0.35 mmol) in dichloromethane (3.5 mL) was added at 0 °C, (S)-2-phenyl propionic acid (58 mg, 0.39 mmol), 4-dimethylaminopyridine (12 mg, 0.1 mmol), and 1,3-dicyclohexylcarbodiimide (80 mg, 0.39 mmol). This solution was stirred 18 h at room temperature, filtered through cotton, and purified on silica. The desired ester was obtained as a colorless oil (103 mg, 97%).
  • 51
    • 33745040383 scopus 로고    scopus 로고
    • note
    • 1H NMR spectra of compounds 12: Minor diastereoisomer 12a: δ = 5.71 (m, 0.074H). Major diastereoisomer 12b: δ = 5.53 (m, 0.926H).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.