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Volumn 20, Issue 8, 2009, Pages 1478-1482

Synthesis of α- and β-lapachone derivatives from hetero diels-alder trapping of alkyl and aryl o-quinone methides

Author keywords

Hetero Diels Alder; Knoevenagel condensation; Lapachones; o Quinone methides

Indexed keywords


EID: 72249118221     PISSN: 01035053     EISSN: 16784790     Source Type: Journal    
DOI: 10.1590/s0103-50532009000800014     Document Type: Article
Times cited : (35)

References (51)
  • 46
    • 76249098990 scopus 로고    scopus 로고
    • NOTE
    • General Procedure for preparing 10a-f and 11a-f. To a round-bottom flask equipped with a magnetic stirring bar was added dissolved lawsone (1 mmol) with water (10 mL) and ethanol (10 mL). Then, the appropriate aldehyde (8 mmols for paraformaldehyde or 3 mmols for arylaldehydes) was added, followed by dropwise addition of the substituted styrenes (3 mmol). The reaction mixture was stirred under reflux until consumption of the starting material (5-8 h). The ethanol was removed under reduced pressure and ethyl acetate (50 mL) was added to the residue and the mixture was washed with saturated aqueous solution of sodium bicarbonate (2 × 20 mL). The organic phase was washed with water (2 × 50 mL), dried over anhydrous sodium sulphate, filtered and concentrated under vacuum. The residual crude product was purified by column chromatography on silica gel using gradient mixture of hexane-ethyl acetate.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.