Zinc enolates derived from ethyl 4-bromo-2,2,4-trimethyl-3-oxopentanoate and 4-bromo-4- ethyl-2,2-dimethyl-3-oxohexanoate react with 2-furan-, 2-thiophene-, 1-(3-nitrophenyl)-2-pyrrole-, 1-acyl-3-indole-, and 2-pyridinecarbaldehydes to give the corresponding 6-hetaryl-5,5-dialkyl-3,3-dimethyltetrahydropyran-2,4-diones.
由乙基4-
溴-2,2,4-三甲基-
3-氧代戊酸酯和4-
溴-4-乙基-2,2-二甲基-3-氧代
己酸酯衍生的
锌烯醇盐与2-
呋喃、2-
噻吩、1-(3-
硝基苯基)-2-
吡咯、1-酰基-3-
吲哚和2-
吡啶甲醛反应,生成相应的6-杂芳基-5,5-二烷基-3,3-二甲基
四氢吡喃-2,4-二酮。