3-Hydroxy-3-methylglutaryl-coenzyme A reductase inhibitors. 3. 7-(3,5-Disubstituted-[1,1'-biphenyl]-2-yl)-3,5-dihydroxy-6-heptenoic acids and their lactone derivatives
摘要:
The syntheses of a series of 7-(3,5-disubstituted [1,1'-bephenyl]-2-yl)-3,5-dihydroxy-6-heptenoic acids and their lactones are reported. Intrinsic 3-hydroxy-3-methylglutaryl-coenzyme A reductase inhibitory activity is enhanced markedly when the biphenyl moiety is substituted by chloro or methyl groups at positions 3 and 5 and a fluoro group at position 4'. These substitutions, followed by resolution, provided compounds 100(+) and 110(+) with 2.8 times the intrinsic inhibitory activity of compactin. Compound 100(+) was shown to possess the same chirality in the lactone ring as compactin by single-crystal X-ray crystallography.
hydroboration of nitriles and imines is attained using pinacolborane with unprecedented catalytic efficiency. Chemoselective hydroboration of nitriles over esters is also demonstrated. A simple [Ru(p-cymene)Cl2]2complex (1) is used as a catalyst precursor, which upon reaction with pinacolborane in situ generates the monohydrido-bridged complex [(η6-p-cymene)RuCl}2(μ-H-μ-Cl)] 2. Further oxidative addition
使用频哪醇硼烷以前所未有的催化效率实现了钌催化的腈和亚胺的硼氢化。还证明了腈对酯的化学选择性氢硼化。一个简单的[Ru(p -cymene)氯2 ] 2配合物(1)被用作催化剂前体,其在与频哪醇反应原位生成monohydrido桥连络合物[(η 6 - p -cymene)的RuCl} 2((μ-H-μ-Cl)] 2。将松果硼烷进一步氧化添加到中间体2中建议导致单核氢化钌物质的形成。反应混合物的质谱分析和与膦连接的钌配合物的独立实验表明,单核钌中间体参与了催化循环。提出从钌中心到配位的腈和硼酸酯亚胺配体的连续分子内1,3-氢化物转移,导致还原并导致形成二硼酸酯,是一种可能的反应机理。
3-Hydroxy-3-methylglutaryl-coenzyme A reductase inhibitors. 3. 7-(3,5-Disubstituted-[1,1'-biphenyl]-2-yl)-3,5-dihydroxy-6-heptenoic acids and their lactone derivatives
作者:G. E. Stokker、A. W. Alberts、P. S. Anderson、E. J. Cragoe、A. A. Deana、J. L. Gilfillan、J. Hirshfield、W. J. Holtz、W. F. Hoffman
DOI:10.1021/jm00152a002
日期:1986.2
The syntheses of a series of 7-(3,5-disubstituted [1,1'-bephenyl]-2-yl)-3,5-dihydroxy-6-heptenoic acids and their lactones are reported. Intrinsic 3-hydroxy-3-methylglutaryl-coenzyme A reductase inhibitory activity is enhanced markedly when the biphenyl moiety is substituted by chloro or methyl groups at positions 3 and 5 and a fluoro group at position 4'. These substitutions, followed by resolution, provided compounds 100(+) and 110(+) with 2.8 times the intrinsic inhibitory activity of compactin. Compound 100(+) was shown to possess the same chirality in the lactone ring as compactin by single-crystal X-ray crystallography.