Directed synthesis of 2-spiroindolines from indole derivatives by formic acid-induced N-acyliminium ion-conjugated diene spirocyclization
摘要:
Synthesis of 2-spiroindolines from 2-substituted indole derivatives via acid-induced N-acyliminium ionconjugated diene spirocyclization was demonstrated. This methodology can be used to direct transformations of 2-substituted indole moieties into 3-nonsubstituted-2-spiroindoline skeletons. (C) 2015 Elsevier Ltd. All rights reserved.
Directed synthesis of 2-spiroindolines from indole derivatives by formic acid-induced N-acyliminium ion-conjugated diene spirocyclization
摘要:
Synthesis of 2-spiroindolines from 2-substituted indole derivatives via acid-induced N-acyliminium ionconjugated diene spirocyclization was demonstrated. This methodology can be used to direct transformations of 2-substituted indole moieties into 3-nonsubstituted-2-spiroindoline skeletons. (C) 2015 Elsevier Ltd. All rights reserved.
An efficient method for the direct allylation of alkylhalides catalyzed by simple cobalt(II) bromide has been developed. This reaction, using a variety of substituted allylicacetates or carbonates, provides the linear product as the major product. It displays broad substrate scope and good functional group tolerance.