Beyond the Five and Six: Evaluation of Seven-Membered Cyclic Anhydrides in the Castagnoli–Cushman Reaction
作者:Mykhailo I. Adamovskyi、Sergey V. Ryabukhin、Dmitriy A. Sibgatulin、Eduard Rusanov、Oleksandr O. Grygorenko
DOI:10.1021/acs.orglett.6b03426
日期:2017.1.6
method worked with imines generated from aromatic or α-branched aliphatic aldehydes and is amenable for both parallel synthesis and scale-up. The procedure for epimerization of the resulting trans-disubstituted tetrahydrobenzo[d]azepines to their cis isomers was also developed.
与苯并[ d ]氧杂环庚烷-2,4(1 H,5 H)-二酮作为酸酐组分的Castagnoli–Cushman反应可用于制备2,3-二取代的4-氧代-2,3,4,5-四氢呋喃-1 H-苯并[ d ]氮杂-1-羧酸的产率为21–75%,反式非对映选择性良好。该方法适用于由芳族或α-支化脂族醛生成的亚胺,适用于平行合成和放大。还开发了将所得的反式-二取代的四氢苯并[ d ]氮杂环庚烷异构化成其顺式异构体的方法。