作者:Ana M. B. S. R. C. S. Costa、Francis M. Dean、Michael A. Jones、Dennis A. Smith
DOI:10.1039/c39830001098
日期:——
di-isopropylamide in tetrahydrofuran at –70 °C followed by pivaloyl chloride the 2-pivaloylmethyl-3-methoxymethylchromone (1) affords by a novel aromatic substitution the 8-pivaloylchromone (3); lithiation of the 2-(2-furyl)chromone (7) with one mol. Equiv. of the reagent followed by carbonation leads not to monocarboxylic acids but to a 50% yield of the dicarboxylic acid (8).
在–70°C下于
四氢呋喃中用
二异丙基氨基化
锂,再加上新
戊酰氯,使2-新戊酰甲基-3-甲氧基甲基
色酮(1)通过新颖的芳族取代反应生成8-新戊酰
色酮(3);1-摩尔2-(2-
呋喃基)
色酮(7)的
锂化。对等 试剂的随后
碳酸化不导致单
羧酸,而是导致二
羧酸(8)的50%收率。