25743-64-0Relevant articles and documents
Bioactivity and structure-activity relationship of cinnamic acid esters and their derivatives as potential antifungal agents for plant protection
Zhou, Kun,Chen, Dongdong,Li, Bin,Zhang, Bingyu,Miao, Fang,Zhou, Le
, (2017/04/26)
A series of cinnamic acid esters and their derivatives were synthesized and evaluated for antifungal activities in vitro against four plant pathogenic fungi by using the mycelium growth rate method. Structure-activity relationship was derived also. Almost all of the compounds showed some inhibition activity on each of the fungi at 0.5 mM. Eight compounds showed the higher average activity with average EC50 values of 17.4-28.6 μg/mL for the fungi than kresoxim-methyl, a commercial fungicide standard, and ten compounds were much more active than commercial fungicide standards carbendazim against P. grisea or kresoxim-methyl against both P. grisea and Valsa Mali. Compounds C1 and C2 showed the higher activity with average EC50 values of 17.4 and 18.5 μg/mL and great potential for development of new plant antifungal agents. The structure-activity relationship analysis showed that both the substitution pattern of the phenyl ring and the alkyl group in the alcohol moiety significantly influences the activity. There exists complexly comprehensive effect between the substituents on the phenyl ring and the alkyl group in the alcohol moiety on the activity. Thus, cinnamic acid esters showed great potential the development of new antifungal agents for plant protection due to high activity, natural compounds or natural compound framework, simple structure, easy preparation, low-cost and environmentally friendly.
One-Pot, Enantioselective Synthesis of 2,3-Dihydroazulen-6(1H)-one: A Concise Access to the Core Structure of Cephalotaxus Norditerpenes
Yongsheng, Zheng,Ghazvini Zadeh, Ebrahim H.,Yuan, Yu
, p. 2115 - 2119 (2016/05/09)
A one-pot enantioselective synthesis of cis-substituted 2,3-dihydroazulen-6(1H)-one is described. In this cascade reaction, an organocatalyzed asymmetric Michael reaction furnishes a highly optically pure nitrobutylphenol intermediate, which is converted into an annulated tropone species by sequential oxidative dearomatization, conjugate addition, electrocyclic ring opening and nitrous acid elimination in the same reaction vessel. Both aliphatic and aromatic nitroalkenes are good substrates for the one-pot reaction, and this protocol appears to be general for various phenylpropionaldehydes as well. In the case of asymmetrically substituted phenylpropionaldehydes, the regioselectivity is likely determined by both the steric and electronic properties of the substituents. This methodology is successfully applied to the synthesis of the tricyclic core structure of Cephalotaxus norditerpenes.
Oxidative alkoxycarbonylation of terminal alkenes with carbazates
Su, Yu-Han,Wu, Zhao,Tian, Shi-Kai
supporting information, p. 6528 - 6530 (2013/07/26)
A range of terminal alkenes smoothly underwent palladium-catalyzed oxidative alkoxycarbonylation with carbazates under an oxygen atmosphere to afford structurally diverse α,β-unsaturated esters in moderate to good yields with excellent regioselectivity and E selectivity.
