Functionalization of substituted 2(1<i>H</i>)- and 4(1<i>H</i>)-pyridones. III. The preparation of substituted 6-Vinyl-1,2-dihydro-2-oxo- and 1,4-dihydro-4-oxo-3-pyridinecarboxylic acids through the chemistry of pyridone dianions
作者:Dana Dejohn、John M. Domagala、James S. Kaltenbronn、Uldis Krolls
DOI:10.1002/jhet.5570200529
日期:1983.9
The synthesis of various substituted 6-vinyl-1,2-dihydro-2-oxo-3-pyridinecarboxylic acids from the dianions of 1,2-dihydro-6-methyl-2-oxo-3-pyridinecarbonitrile and the corresponding 3-t-butyl ester is reported. The dianions were generated with LDA in THF at low temperature and reacted with various carbonyl substrates. Several conditions for the dehydration and hydrolysis of these adducts to the vinyl
由1,2-二氢-6-甲基-2-氧-3-吡啶腈的二价阴离子和相应的3- t合成各种取代的6-乙烯基-1,2-二氢-2-氧-3-吡啶羧酸报道了丁酯。在低温下用LDA在THF中生成二价阴离子,并使其与各种羰基底物反应。讨论了这些加合物脱水和水解为乙烯基吡啶酮酸的几种条件。利用用于2-吡啶酮类似物的条件,通过新的1,4-二氢-6-二价阴离子制备了一系列取代的6-乙烯基-1,4-二氢-4-氧代-3-吡啶羧酸甲基-4-氧代-3-吡啶羧酸,叔丁酯。