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Volumn , Issue 16, 2008, Pages 2500-2502

An approach to benzannelated [5,6]-spiroketals

Author keywords

Diels Alder reactions; Heterocycles; Natural products; Ortho quinone methide; Spiro compounds

Indexed keywords

ACETAL; ACETIC ACID DERIVATIVE; BENZYL ACETATE; BUTYROLACTONE;

EID: 54149095050     PISSN: 09365214     EISSN: None     Source Type: Journal    
DOI: 10.1055/s-2008-1078057     Document Type: Article
Times cited : (16)

References (22)
  • 11
    • 38349174497 scopus 로고    scopus 로고
    • For a [3+2]-cycloaddition approach, see: (a) Wu, K.-L.; Wilkinson, S.; Reich, N. O.; Pettus, T. R. R. Org. Lett. 2007, 9, 5537.
    • For a [3+2]-cycloaddition approach, see: (a) Wu, K.-L.; Wilkinson, S.; Reich, N. O.; Pettus, T. R. R. Org. Lett. 2007, 9, 5537.
  • 13
    • 0036642529 scopus 로고    scopus 로고
    • For an excellent review of ortho-quinone methides, see: Van De Water, R. W.; Pettus, T. R. R. Tetrahedron 2002, 58, 5367.
    • For an excellent review of ortho-quinone methides, see: Van De Water, R. W.; Pettus, T. R. R. Tetrahedron 2002, 58, 5367.
  • 20
    • 54149099120 scopus 로고    scopus 로고
    • General Procedure: 2-Hydroxybenzyl acetate (8a; 40 mg, 0.24 mmol) in γ-methylene-γ-butyrolactone (0.24 mL, 1.0 M) was heated at 100°C for 20 h. The cooled reaction mixture was purified by flash column chromatography (SiO2, 25% → 30% EtOAc in PE) to give 9a as a white solid (36 mg, 84, mp 107-108°C (lit.12 106°C, Rf 0.26 (EtOAc-PE, 3:7, IR: 2961, 2920, 1776 (C=O, 1582, 1489, 1447, 1251, 1220, 1170, 1093, 1055 cm-1. 1H NMR (400 MHz, CDCl3, δ, 7.07-7.17 (m, 2 H, 2 x ArCH, 6.93 (dt, J, 7.4, 1.1 Hz, 1 H, ArCH, 6.81 (dd, J, 8.1, 1.1 Hz, 1 H, ArCH, 3.06-3.18 (m, 1 H, 1 H of CH2, 2.91-3.04 (m, 1 H, 1 H of CH2, 2.79 (ddd, J, 16.5, 6.0, 2.5 Hz, 1 H, 1 H of CH 2, 2.64 (ddd, J, 17.6, 9.5, 2.5 Hz, 1 H, 1 H of CH 2, 2.52 ddd, J, 13.1, 9.5, 2.5 Hz, 1 H, 1 H of CH 2
    • 3Na: 227.0684; found: 227.0690.
  • 21
    • 25444454835 scopus 로고    scopus 로고
    • 2 (5 mol%), see: Weinert, E. E.; Frankenfield, K. N.; Rokita, S. E. Chem. Res. Toxicol. 2005, 18, 1364.
    • 2 (5 mol%), see: Weinert, E. E.; Frankenfield, K. N.; Rokita, S. E. Chem. Res. Toxicol. 2005, 18, 1364.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.