作者:Viet-Anh Nguyen、Christine L. Willis、William H. Gerwick
DOI:10.1039/b106087m
日期:——
The first total synthesis of the trichlorinated natural
product barbamide is described. The convergent approach involves coupling
(S)-3-trichloromethylbutanoyl chloride with Meldrum’s acid
(2,2-dimethyl-1,3-dioxane-4,6-dione) to give 15 followed by addition of the
novel secondary amine N-methyl-(S)-dolaphenine 2
(prepared in 6 steps and 24% overall yield from
N-Cbz-L-phenylalanine) to give the β-keto amide 16
which was converted directly to the required (E)-enol ether.
报道了三氯化天然产物barbamide的首次全合成。该合成方法通过将(S)-3-三氯甲基丁酰氯与Meldrum酸(2,2-二甲基-1,3-二氧杂环己烷-4,6-二酮)偶联得到15,然后加入新型仲胺N-甲基-(S)-dolaphenine 2(从N-Cbz-L-苯丙氨酸经过6步反应,总产率为24%),得到β-酮酰胺16,随后直接转化为所需的(E)-烯醇醚。