Synthesis, Chemical Transformation and Antimicrobial Activity of a Novel Class of Nitroolefins: 1,3-Diaryl-2-nitroprop-1-enes
摘要:
synthesis of novel, biologically active 1,3-diaryl-2-nitroprop-1-enes (4) is reported. The synthesis involves condensation between aromatic aldehydes (1) and beta-aryl nitroethanes (3). The chemical transformation of the nitro group in diaryl nitropropenes to a carbonyl function has resulted in a new route to the synthesis of an alpha-hydroxy analog (7c) of a naturally occurring 3, 3'. 4, 4'-tetramethoxy chalcone. The antimicrobial activity of the 1, 3-diaryl-2-nitroprop-1-enes (4a-j) was tested against three gram positive bacteria, two gram negative bacteria and two fungi. These compounds exhibited broad spectrum and microbial activity.
Synthesis, Chemical Transformation and Antimicrobial Activity of a Novel Class of Nitroolefins: 1,3-Diaryl-2-nitroprop-1-enes
作者:Ram Prasad K. Kodukulla、Girish K. Trivedi、Jyoti D. Vora、Hari H. Mathur
DOI:10.1080/00397919408011304
日期:1994.3
synthesis of novel, biologically active 1,3-diaryl-2-nitroprop-1-enes (4) is reported. The synthesis involves condensation between aromatic aldehydes (1) and beta-aryl nitroethanes (3). The chemical transformation of the nitro group in diaryl nitropropenes to a carbonyl function has resulted in a new route to the synthesis of an alpha-hydroxy analog (7c) of a naturally occurring 3, 3'. 4, 4'-tetramethoxy chalcone. The antimicrobial activity of the 1, 3-diaryl-2-nitroprop-1-enes (4a-j) was tested against three gram positive bacteria, two gram negative bacteria and two fungi. These compounds exhibited broad spectrum and microbial activity.
Phosphine-Catalyzed Chemoselective Reduction/Elimination/Wittig Sequence for Synthesis of Functionalized 3-Alkenyl Benzofurans
作者:Yan-Cheng Liou、Heng-Wei Wang、Athukuri Edukondalu、Wenwei Lin
DOI:10.1021/acs.orglett.1c00737
日期:2021.4.16
An efficient protocol for the construction of functionalized 3-alkenyl benzofurans is demonstrated under metal-free conditions using catalytic amount of phosphine proceeding an intramolecular Wittigreaction. This one-potreaction initiated by the phospha-Michael addition of phosphine to O-acylated nitrostyrene, in which phosphine was in-situ-generated from the chemoselective reduction of phosphine