using diverse electrophilic double bonds. Ethyl radical derived from Et3B under air cleaved the C–Te bond of 2 to generate α-alkoxy bridgehead radical I, which reacted with cycloalkenones, cycloalkylidenemalononitriles, allyl halides, and imines at or below ambient temperature. These intermolecular reactions from O,Te-acetal 2 were mild and versatile, and were superior to those of O,Se-acetal 1 in
Et 3 B / O 2介导的O,Te-乙缩醛2的自由基偶联反应是通过使用各种亲电双键进行的。空气中从Et 3 B衍生的乙基在2的C-Te键上断裂,生成α-烷氧基桥头基I,在室温或低于环境温度下,它与环烯酮,环烷基亚甲基丙二腈,烯丙基卤和亚胺反应。O,Te-乙缩醛2的这些分子间反应温和,多用途,优于O,Se-乙缩醛1的分子间反应在效率和基材范围方面。总共描述了14个新的偶联反应和9个改进的偶联反应,所有这些反应都实现了将功能化碳单元安装在三恶唑金刚烷的空间位阻桥头位置。
3-(2-Aminocarbonylphenyl)propanoic acid analogs as potent and selective EP3 receptor antagonists. Part 2: Optimization of the side chains to improve in vitro and in vivo potencies
A series of 3-[2-[(3-methyl-1-phenylbutyl)amino]carbonyl}-4-(phenoxymethyl)phenyl]propanoic acid analogs were synthesized and evaluated for their in vitro potency. In most cases, introduction of one or twosubstituents into the twophenyl moieties resulted in the tendency of an increase or retention of in vitro activities. Several compounds, which showed excellent subtype selectivity, were evaluated