Synthesis and antiplatelet activity of gemfibrozil chiral analogues
摘要:
The chiral analogues of gemfibrozil 5-(2.5-dimethylphenoxy)-2-methylpentanoic acid and 5-(2,5-dimethylphenoxy)-2-ethylpentanoic acid were synthesized in optically active form using (S)-4-(1-methylethyl)-2-oxazolidinone as chiral auxiliary. All compounds inhibit human platelet aggregation. from these data. one can surmise that all tested compounds and gemfibrozil act at the platelet level with different mechanism than that of ASA, even if with a different potency. (C) 2002 Elsevier Science Ltd. All rights reserved.
Ligand-Promoted Alkylation of C(sp<sup>3</sup>)–H and C(sp<sup>2</sup>)–H Bonds
作者:Ru-Yi Zhu、Jian He、Xiao-Chen Wang、Jin-Quan Yu
DOI:10.1021/ja508165a
日期:2014.9.24
9-Methylacridine was identified as a generally effective ligand to promote a Pd(II)-catalyzed C(sp3)–H and C(sp2)–H alkylation of simple amides with various alkyl iodides. This alkylation reaction was applied to the preparation of unnatural amino acids and geometrically controlled tri- and tetrasubstituted acrylic acids.
Palladium(0)-Catalyzed Alkynylation of C(sp<sup>3</sup>)–H Bonds
作者:Jian He、Masayuki Wasa、Kelvin S. L. Chan、Jin-Quan Yu
DOI:10.1021/ja400648w
日期:2013.3.6
The alkynylation of β-C(sp(3))-H bonds in aliphatic amides with alkynyl halides has been enabled using Pd(0)/N-heterocyclic carbene (NHC) and Pd(0)/phosphine (PR3) catalysts. This is the first example of utilizing [AlkynylPd(II)L(n)] complexes to activate C(sp(3))-H bonds.
Unprecedented copper-mediated oxidative demethylation of propionamides via bidentate-chelation assistance
作者:Jing-Hui Liu、Mian Cui、Xiao-Yu Lu、Zhen-Qi Zhang、Bin Xiao、Yao Fu
DOI:10.1039/c5cc08393a
日期:——
The copper-mediated bidentate-chelation directing group assisted oxidative demethylation of substituted propionamides was developed for the first time.
首次开发了铜介导的双齿螯合定向基辅助的取代丙酰胺的氧化去甲基化反应。
Synthesis and antiplatelet activity of gemfibrozil chiral analogues
The chiral analogues of gemfibrozil 5-(2.5-dimethylphenoxy)-2-methylpentanoic acid and 5-(2,5-dimethylphenoxy)-2-ethylpentanoic acid were synthesized in optically active form using (S)-4-(1-methylethyl)-2-oxazolidinone as chiral auxiliary. All compounds inhibit human platelet aggregation. from these data. one can surmise that all tested compounds and gemfibrozil act at the platelet level with different mechanism than that of ASA, even if with a different potency. (C) 2002 Elsevier Science Ltd. All rights reserved.