Synthesis 2020; 52(23): 3632-3639
DOI: 10.1055/s-0040-1707352
paper
© Georg Thieme Verlag Stuttgart · New York

DABCO-Catalyzed α-Regio- and Diastereoselective (3+2) Cycloadditions of Nitrone Ylides from Isatins and Activated Alkenes

Xiangsheng Cheng
a   Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, 310018, P. R. China
,
Weihong Fei
a   Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, 310018, P. R. China
,
Zihao Luo
a   Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, 310018, P. R. China
,
Jianjun Li
a   Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, 310018, P. R. China
,
Zhen Wang
b   School of Pharmaceutical Sciences and Chongqing Key Laboratory of Natural Drug Research, Chongqing University, Chongqing 401331, P. R. China   Email: Orgywj@zstu.edu.cn   Email: wangz1114@cqu.edu.cn
,
Weijun Yao
a   Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, 310018, P. R. China
› Author Affiliations
We gratefully acknowledge the Natural Science Foundation of Zhejiang Province (Grant No. LY20B020012), the National Natural Science Foundation of China (Grant No. 21702185), Chongqing Research Program of Basic Research and Frontier Technology (Grant No. cstc2018jcyjAX0454), and the Science Foundation of Zhejiang Sci-Tech University (Grant No. 16062189-Y) for the financial support of this work.
Further Information

Publication History

Received: 27 May 2020

Accepted after revision: 18 July 2020

Publication Date:
20 August 2020 (online)


Abstract

α-Regio- and diastereoselective (3+2) cycloadditions of nitrone ylides derived from isatins with activated alkenes have been demonstrated. This mild protocol allows rapid access to a wide range of 3′,5′-diaryl-1′-hydroxy-2-oxospiro[indoline-3,2′-pyrrolidine] derivatives by using DABCO as an efficient catalyst. This method could also be carried out through three-component reaction efficiently in good yields and excellent diastereoselectivity.

Supporting Information