Novel 3-substituted-4-aminoalkoxy-5,6-condensed ring-2-pyranones are disclosed as having utility as pharmacologically active compounds, in particular vasodilatory, hypotensive, anti-ischemic and anti-tussive activity. The compounds may be 3-phenyl-4-morpholinoalkoxy-coumarins. Administration may be by the oral or parenteral route. Intermediates useful in the production of these compounds are also disclosed.
Hydrogen bonds involving polar CH groups. Part 10. Intramolecular hydrogen bonds in 1-(ω-substituted-alkyl) bis(phenylsulphonyl)methanes
作者:Chuen Li、Michael P. Sammes
DOI:10.1039/p19830002193
日期:——
Intramolecularhydrogenbondsinvolving the polar methine group have been detected by 1H n.m.r. spectroscopy in dichloro[2H2]methane in 1-(ω-methoxyalkyl)- and 1-(ω-dialkylaminoalkyl)-bis(phenylsulphonyl)methanes. Dialkylamino groups are more effective donors than methoxy, and interactions are maximised when a five- or ideally a six-membered ring can be formed. The optimum compounds, having a methyl
通过1 H nmr光谱在1-(ω-甲氧基烷基)-和1-(ω-二烷基氨基烷基)-双(苯基磺酰基)甲烷中的二氯[ 2 H 2 ]甲烷中检测到了涉及极性次甲基的分子内氢键。二烷基氨基比甲氧基更有效的供体,并且当可以形成五元或理想的六元环时,相互作用可以最大化。在侧链上具有甲基以降低构象迁移率的最佳化合物显示约1 H nmr下场位移。相对于参考化合物为1.9 ppm,将温度降低至–40°C时增加至2.2 ppm。通常,下场位移大于类似取代的1,3-二噻吩1,1,3,3-四氧化物的位移。苯基似乎进一步降低了侧链的构象迁移率。相互作用部分通过乙腈和吡啶解偶联,而完全通过三氟乙酸解偶联。还提供了一些有关相互作用的证据。
Compositions providing improved functionalization of terminal anions and processes for improved functionalization of terminal anions
申请人:——
公开号:US20020010082A1
公开(公告)日:2002-01-24
Compositions including one or more anionic polymerization initiators and one or more additives for improving functionalizing efficiency of living polymer anions are disclosed. The present invention also provides compositions including one or more electrophiles and one or more additives for improving functionalizing efficiency of living polymer anions. Novel electrophiles and processes for improving polymer anion functionalization efficiencies are also disclosed.