e) and two related compounds is reported. Phacidin has been prepared in four steps from the readily available triacetic acid lactone (4-hydroxy-6-methyl-2H-pyran-2-one), while the decarbonylated derivative 2 and the bromo compound 3 have been synthesized utilizing a route based upon the condensation of the dianion of ethyl acetoacetate with a substituted 1,3-dithiane-2-carboxaldehyde.
报道了抗生素真菌代谢物 phacidin 1(4-甲氧基-6-壬酰基-
2H-吡喃-2-one-3-
甲醛)和两种相关化合物的合成。Phacidin 已从容易获得的
三乙酸内酯 (4-hydroxy-6-methyl-2H-pyran-2-one) 分四步制备,而脱羰衍
生物 2 和
溴化合物 3 已使用基于以下的路线合成
乙酰乙酸乙酯的双阴离子与取代的
1,3-二噻烷-2-甲醛缩合。