Enantioselective Synthesis of Spirooxindoles: Asymmetric [3+2] Cycloaddition of (3-Isothiocyanato)oxindoles with Azodicarboxylates
作者:Yu Jiang、Cheng-Kui Pei、Dan Du、Xiao-Ge Li、Ya-Nan He、Qin Xu、Min Shi
DOI:10.1002/ejoc.201301418
日期:2013.12
asymmetric [3+2] cycloaddition of (3-isothiocyanato)oxindoles with azodicarboxylates has been explored in the presence of (DHQD)2PHAL. It affords spirooxindoles having two heterocycles at their C3′-position in excellent yields, with high enantioselectivities, and under mild conditions within 5 min. Moreover, another spirooxindole derived from the reaction of (3-isothiocyanato)oxindole with two molecules
已经在 (DHQD)2PHAL 存在下探索了(3-异硫氰酸根合)羟吲哚与偶氮二羧酸酯的催化不对称 [3+2] 环加成反应。它以优异的收率、高对映选择性和温和条件在 5 分钟内提供在其 C3'-位置具有两个杂环的螺吲哚。此外,由(3-异硫氰酸根合)羟吲哚与两分子偶氮二羧酸酯反应衍生的另一种螺羟吲哚也可以在标准条件下以同样高的对映选择性以极好的收率形成。