Synthesis 2021; 53(03): 518-526
DOI: 10.1055/s-0040-1707292
paper

Organocatalyzed [2+2] Cycloaddition Reactions between Quinone Imine Ketals and Allenoates

Teng Liu
a   Center for Yunnan-Guizhou Plateau Chemical Functional ­Materials and Pollution Control, College of Chemistry and ­Environmental Science, Qujing Normal University, Qujing, 655011, P. R. China   Email: 15288404381@163.com   Email: fxcheng2019@163.com
,
Chixian He
a   Center for Yunnan-Guizhou Plateau Chemical Functional ­Materials and Pollution Control, College of Chemistry and ­Environmental Science, Qujing Normal University, Qujing, 655011, P. R. China   Email: 15288404381@163.com   Email: fxcheng2019@163.com
,
Fan Wang
a   Center for Yunnan-Guizhou Plateau Chemical Functional ­Materials and Pollution Control, College of Chemistry and ­Environmental Science, Qujing Normal University, Qujing, 655011, P. R. China   Email: 15288404381@163.com   Email: fxcheng2019@163.com
,
Xiang Shen
a   Center for Yunnan-Guizhou Plateau Chemical Functional ­Materials and Pollution Control, College of Chemistry and ­Environmental Science, Qujing Normal University, Qujing, 655011, P. R. China   Email: 15288404381@163.com   Email: fxcheng2019@163.com
,
Yongqin Li
a   Center for Yunnan-Guizhou Plateau Chemical Functional ­Materials and Pollution Control, College of Chemistry and ­Environmental Science, Qujing Normal University, Qujing, 655011, P. R. China   Email: 15288404381@163.com   Email: fxcheng2019@163.com
,
Man Lang
a   Center for Yunnan-Guizhou Plateau Chemical Functional ­Materials and Pollution Control, College of Chemistry and ­Environmental Science, Qujing Normal University, Qujing, 655011, P. R. China   Email: 15288404381@163.com   Email: fxcheng2019@163.com
,
Guijun Li
a   Center for Yunnan-Guizhou Plateau Chemical Functional ­Materials and Pollution Control, College of Chemistry and ­Environmental Science, Qujing Normal University, Qujing, 655011, P. R. China   Email: 15288404381@163.com   Email: fxcheng2019@163.com
,
Chao Huang
b   School of Chemistry and Environment, Yunnan Minzu University, Kunming, 650500, P. R. China   Email: huangchao@ynu.edu.cn
,
Feixiang Cheng
a   Center for Yunnan-Guizhou Plateau Chemical Functional ­Materials and Pollution Control, College of Chemistry and ­Environmental Science, Qujing Normal University, Qujing, 655011, P. R. China   Email: 15288404381@163.com   Email: fxcheng2019@163.com
› Author Affiliations
This work was supported by the Program for the Applied Basic Research Foundation of Yunnan Province (No. 2018FB019), the Opening Foundation of Key Laboratory of Natural Resources and Pharmaceutical Chemistry, Ministry of Education, Yunnan University (No. 2018FH001-019), the NSFC (No. 21662046, 21202142), and Yunnan Local Colleges Research Projects of China (No. 2019FH001-006).


Abstract

A new cycloaddition reaction of quinone imine ketals (QIKs), which could be utilized to the construction of functionalized azaspirocyclics under mild conditions, is described. This transformation involved a [2+2] cycloaddition reaction between QIKs and allenoates catalyzed by DABCO, and then treatment with 1 N HCl in one-pot. The strategy could provide a practical route to access azetidine-fused spirohexadienones in good to excellent yields and with high E-selectivity.

Supporting Information



Publication History

Received: 29 July 2020

Accepted after revision: 28 August 2020

Article published online:
24 September 2020

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