Alper PB, Meyers C, Lerchner A, Siegel DR, Carreira EM
Laboratorium für Organische Chemie, ETH-Zentrum, Universitätstrasse 16, CH-8092 Zürich (Switzerland).
Angew Chem Int Ed Engl. 1999 Nov 2;38(21):3186-3189.
The role of the bifunctional catalyst is decisive: The magnesium ion as Lewis acid and its nucleophilic iodide counterion contribute in synergy to the successful ring expansion of the cyclopropane 1 by aldimine 2 [Eq. (1)]. This reaction offers a novel route to spiro[pyrrolidin-3,3'-oxindoles] 3.
镁离子作为路易斯酸及其亲核碘离子抗衡离子协同作用,使环丙烷1与醛亚胺2成功进行扩环反应[式(1)]。该反应为合成螺[吡咯烷-3,3'-氧化吲哚]3提供了一条新途径。