Synlett 2016; 27(08): 1287-1291
DOI: 10.1055/s-0035-1560600
letter
© Georg Thieme Verlag Stuttgart · New York

Lewis Base and Brønsted Base Dual-Catalyzed Formal [4+3] Cyclo­addition Reaction: Synthesis of Aza-Spirocycloheptane Oxindole

Jin-Yu Liu
State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. of China   Email: xupf@lzu.edu.cn
,
Hong Lu
State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. of China   Email: xupf@lzu.edu.cn
,
Chen-Guang Li
State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. of China   Email: xupf@lzu.edu.cn
,
Yong-Min Liang
State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. of China   Email: xupf@lzu.edu.cn
,
Peng-Fei Xu*
State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. of China   Email: xupf@lzu.edu.cn
› Author Affiliations
Further Information

Publication History

Received: 10 November 2015

Accepted after revision: 29 December 2015

Publication Date:
08 February 2016 (online)


Abstract

An intermolecular, quaternary carbon center forming [4+3] cycloaddition reaction catalyzed by Lewis base and Brønsted base has been successfully developed. The dual catalysis exhibits a superior ability to enable a previously challenging reaction, and the corresponding quaternary aza-spirocycloheptane oxindole scaffolds are efficiently synthesized with moderate to high yields.

Supporting Information