作者:Matthew J. Piggott、Dieter Wege
DOI:10.1071/ch00057
日期:——
6-dimethoxy-4,5-methylenedioxybenzoic acid (12) was prepared from1,4-dimethoxy-2,3-methylenedioxybenzene (8) via the isatin (11). The benzynegenerated from (12) was intercepted with3-acetyl-2-ethoxy-4-[(4-methoxyphenoxy)methyl]furan (4) to give thenaphthol (27), which on treatment with cericammonium nitrate gave the dimethylether of ventilone A(29). Demethylation with boron tribromide thenaffordedventilone A (1)
2-氨基-3,6-二甲氧基-4,5-亚甲二氧基苯甲酸(12)由1,4-二甲氧基-2,3-亚甲二氧基苯(8)经靛红(11)制备。由 (12) 生成的苯炔被 3-乙酰基-2-乙氧基-4-[(4-甲氧基苯氧基)甲基]呋喃 (4) 拦截,得到萘酚 (27),用硝酸铈铵处理后得到万替隆 A 的二甲醚 ( 29)。用三溴化硼去甲基化然后得到ventilone A (1)。