A procedure on palladium-catalyzed selective aminocarbonylation of styrenes with nitroarenes for the synthesis of α,β-unsaturatedamides has been developed. A range of substituted α,β-unsaturatedamides were synthesized in moderate to good yields. Interestingly, nitroarenes act as both a nitrogen source and oxidant, and Mo(CO)6 acts as a solid CO source and reductant in this catalytic system.
Four series of acidamides were synthesized, and through measurement using a fluorogenic substrate assay with human recombinant MMP-1, MMP-2 and MMP-9, compound 3f showed considerable inhibitory activities against MMP-2, MMP-9 and the best selectivity over MMP-1. Preliminary structure–activity relationship analysis indicated that caffeicacidamides with electron-donating groups at para-position of
An efficient asymmetric hydrophosphonylation of unsaturated amides catalyzed by rare-earth metal amides [(Me<sub>3</sub>Si)<sub>2</sub>N]<sub>3</sub>RE(μ-Cl)Li(THF)<sub>3</sub> with phenoxy-functionalized chiral prolinols
作者:Zenghui Fei、Chao Zeng、Chengrong Lu、Bei Zhao、Yingming Yao
DOI:10.1039/c7ra00468k
日期:——
An asymmetric hydrophosphonylation reaction of diethyl phosphite with α,β-unsaturated amides catalyzed by [(Me3Si)2N]3RE(μ-Cl)Li(THF)3 (RE = Sc (1), Y (2), La (3), Yb (4) and Lu (5)) with H2Ln ((S)-2,4-R2-6-[[2-(hydroxydiphenylmethyl)pyrrolidin-1-yl]methyl]phenol) (R = tBu (H2L1); R = 1-cumyl (H2L2) and R = 1-adm (H2L3)) was disclosed. The effects of different central metals and proligands on the addition
亚磷酸二乙酯与[(Me 3 Si)2 N] 3 RE(μ-Cl)Li(THF)3(RE = Sc(1),Y(2), La(3),Yb(4)和Lu(5))与H 2 L n((S)-2,4-R 2 -6-[[[((2-羟基二苯基甲基)吡咯烷-1-基]甲基]苯酚)(R = t Bu(H 2 L 1); R = 1-枯基(H 2 L 2)和R = 1-adm(H 2 L 3))被披露。测试了不同的中心金属和配体对加成反应的影响,发现Sc配合物1和配体H 2 L 2的结合效果最好。使用相对较宽的不饱和酰胺范围,可获得优异的化学收率(高达99%)和良好至高的对映选择性(从73%到89%不等)。还讨论了当前系统中的活跃物种。
The triflic acid-mediated cyclisation of N-benzylcinnamanilides
作者:Frank D. King、Stephen Caddick
DOI:10.1016/j.tet.2013.07.075
日期:2013.10
N-Benzylcinnamanilides cyclise with triflic acid to form 1-benzyl-4-aryl-2,4-dihydro-1H-quinolin-2-ones and 2,5-diaryl-benzazepin-3-ones. The product ratio is determined by the preferred orientation of the amide and by the electronics of the substituents. With ortho-substituted anilides, N-debenzylation also occurs to give 4-aryl-2,4-dihydro-1H-quinoline-2-ones. (C) 2013 Elsevier Ltd. All rights reserved.