Synthesis and characterization of novel pyridyl/naphthyl/(diphenyl)methylseleno substituted alkanoic acids: X-ray structure of 2-pyridylselenoethanoic acid, 2-naphthylselenoethanoic acid and 2-(diphenyl)methylselenoethanoic acid
作者:Aman Bhalla、Yogesh Nagpal、Rajeev Kumar、S.K. Mehta、K.K. Bhasin、S.S. Bari
DOI:10.1016/j.jorganchem.2008.10.020
日期:2009.1
sodium borohydride in ethanol. The ethyl pyridyl/naphthyl/(diphenyl)methylseleno substituted alkanoates (8–13) on basic hydrolysis and subsequent acidification afford pyridyl/naphthyl/(diphenyl) methylseleno substituted alkanoic acids (20–25) in excellent yields. These selenoalkanoates (8–13) and selenoalkanoic acids (20–25) have been characterized by elemental analysis and various spectroscopic techniques
一些新颖的和合成地重要吡啶基/萘/(二苯基)甲硒的取代的链烷酸(20 - 25),使用一种高效且操作简单的策略已被合成。起始衬底,乙基吡啶基/萘/(二苯基)甲硒基取代的链烷酸酯(8 - 13)很容易被治疗乙基chloroalkanoates的制备7(一- ç)与亲核硒试剂RSeNa +,从联吡啶/二萘/二裂解产生(二苯甲基)二硒化物(1 – 6)与硼氢化钠的乙醇溶液。乙基吡啶/萘/(二苯基)甲硒基取代的链烷酸酯(8 - 13)上基本水解和随后酸化得到吡啶基/萘/(二苯基)甲硒基取代的链烷酸(20 - 25)以优良产率。这些硒代链烷酸酯(8 – 13)和硒代链烷酸(20 – 25)已经通过元素分析和各种光谱技术进行了表征。NMR(1 H,13 C和77 Se),IR和质谱。2-吡啶基硒酸乙烯酸(20a的分子结构),还借助单晶X射线分析建立了2-萘基硒代乙酸(23a)和2-(二苯基)甲基硒代乙酸(24a)。