期刊
NATURAL PRODUCT RESEARCH
卷 20, 期 2, 页码 207-212出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/14786410500078243
关键词
Heterophragma adenophyllum; lapachol; dehydro-alpha-lapachone; alpha-lapachone; beta-lapachone; adenophyllone; microwave technique
Cyclization reactions of lapachol (1) isolated from Heterophragma adenophyllum have been studied under microwave irradiation under different conditions using alumina (acidic, basic and neutral)/silica gel/montmorillonite (KSF and K-10) as solid support along with neat reaction using 2-3 drops of DMF giving naturally occurring dehydro-alpha-lapachone (2), alpha-lapachone (3), beta-lapachone (4) depending upon the nature of support and irradiation time. A novel naphthoquinone derivative adenophyllone (5) can be synthesized from lapachol using DMF under microwaves.
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