Design, synthesis and insecticidal activity of spiro heterocycle containing neonicotinoid analogs
作者:Nan-Yang Chen、Li-Ping Ren、Min-Ming Zou、Zhi-Ping Xu、Xu-Sheng Shao、Xiao-Yong Xu、Zhong Li
DOI:10.1016/j.cclet.2013.12.004
日期:2014.2
Spiro heterocycles frequently occur in bioactive molecules. In the pursuit of neonicotinoids with Spiro heterocycles, three types of novel neonicotinoids with spirobenzofuranone, spirooxindole or spiroacenaphythylenone framework were designed and synthesized. Insecticidal evaluation showed that some of spirobenzofuranone containing neonicotinoids exhibited moderate activity against cowpea aphid, armyworm or brown planthopper. (C) 2013 Xu-Sheng Shao and Zhong Li. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
Application of PEG-400 as a green biodegradable polymeric medium for the catalyst-free synthesis of spiro-dihydropyridines and their use as acetyl and butyrylcholinesterase inhibitors
A simple, efficient and green approach for the synthesis of spiro-dihydropyridines derivatives by one-pot multi-component reaction of isatin or acenaphthoquinone derivatives (1 equiv) with malononitrile (1 equiv) and N,N′-substituted-2-nitroethene-1,1-diamines (1 equiv) in PEG-400 under catalyst-free conditions is described. This method provides several advantages such as environmental friendliness