A practical synthesis of three aliphatic metabolites of capsaicin: 16-Hydroxycapsaicin, 17-hydroxycapsaicin, and 16,17-dehydrocapsaicin
作者:Die Li、Lulu Guo、Xiaodong Guo、Jian Mao、Fuqiang Liu、Guobi Chai、Qingzhao Shi、Lingbo Ji、Dingzhong Wang、Qidong Zhang、Wu Fan
DOI:10.1080/00397911.2023.2195113
日期:2023.6.3
Abstract The first straightforward synthesis of 16-hydroxycapsaicin, 17-hydroxycapsaicin and 16,17-dehydrocapsaicin, the major aliphatic metabolites of capsaicin, is reported. The amidation of hept-6-enoic acid with vanillylamine hydrochloride, followed by olefin metathesis using 2-methylbut-3-en-2-ol as partner furnished 16-hydroxycapsaicin in 56.1% overall yield with excellent E-selectivity. The
摘要 报道了 16-羟基辣椒素、17-羟基辣椒素和 16,17-脱氢辣椒素(辣椒素的主要脂肪族代谢物)的首次直接合成。hept-6-enoic 酸与香草胺盐酸盐的酰胺化,然后使用 2-methylbut-3-en-2-ol 作为合作伙伴进行烯烃复分解,以 56.1% 的总收率和出色的E-选择性提供 16-羟基辣椒素。庚-6-烯酸甲酯与 but-3-en-2-one 的E-选择性烯烃复分解生成 α,β-不饱和酮化合物,该化合物与 Ph 3 P + MeBr -发生 Wittig 反应, 提供相应的 1,3-二烯衍生物。通过水解脱甲基和硼氢化-氧化引入羟基后,该二烯可进一步转化为16,17-脱氢辣椒素和17-羟基辣椒素,总产率分别为35.6%和7.8%。