The lithium aluminum hydride reduction of nitriles in the aromatic resin acid series to aldimines and the conversion of the products to other derivatives are described. The effect of the stereochemistry of the nitriles on the rate of reduction is noted. The transformation of dehydroabietane into a dehydro product is indicated. The syntheses of a desoxydecarboxy-5,6-dehydro-7-keto derivative of podocarpic acid and its optical antipode are discussed. The stereochemistry of hydrogenation of 5,6-dehydro derivatives of podocarpic acid is reported. The effect of a 7-keto group on the rate of hydrolysis of methyl esters of aromatic resin acids is illustrated. The reactions of 6-bromo-7-keto derivatives of methyl podocarpate with bases are portrayed.
本文介绍了芳香树脂酸系列中腈的锂铝氢化还原成醛亚胺的过程,以及产物转化为其他衍生物的方法。注意到腈的立体化学对还原速率的影响。指出了脱氢松香烷转化为脱氢产物的过程。讨论了白杉酸的脱羧-5,6-脱氢-7-酮衍生物及其光学对映体的合成。报道了白杉酸的5,6-脱氢衍生物的氢化立体化学。说明了7-酮基团对芳香树脂酸甲酯水解速率的影响。描绘了甲基白杉酸的6-溴-7-酮衍生物与碱反应的反应过程。