由于对市售药物的抗药性的不断出现,疟疾仍然是对人类的主要威胁。合成了二十一种带有末端联苯,芳基磺酰胺或芳基砜基序的吡唑并吡喃基抑制剂,并针对叶酸循环的关键酶丝氨酸羟甲基转移酶(SHMT)进行了测试。在低纳摩尔范围(18-56 n m)的基于细胞的测定中,最佳配体可抑制靶标中的恶性疟原虫(Pf)和拟南芥(At)SHMT以及Pf NF54菌株。间日疟原虫的七个共晶体结构(Pv)SHMT的分辨率为2.2–2.6Å。我们观察到邻位取代联苯部分的扭转角对基于细胞的功效产生了前所未有的影响。在与芳基磺酰胺类似物的络合物中突出显示了磺酰基部分的特殊亲脂性,它们以它们优选的交错方向结合。在配体的构象偏好的背景下讨论了结果。
This study unveils a new catalytic crossover reaction of sulfinamides. Leveraging mild acid catalysis, the reaction demonstrates a high tolerance to structural variations, yielding equimolar products across diverse sulfinamide substrates. Notably, small sulfinamide libraries can be selectively oxidized to sulfonamides, providing a new platform for ligand optimization and discovery in medicinal chemistry
Copper-Catalyzed Amination of Primary Benzylic C−H Bonds with Primary and Secondary Sulfonamides
作者:David A. Powell、Hope Fan
DOI:10.1021/jo100197r
日期:2010.4.16
A room-temperature, copper-catalyzed amination of primary benzylic C-H bonds with primary and secondary sulfonamides is described. The reaction is applicable to the coupling of a range of primary and secondary benzylic hydrocarbons with a diverse set of sulfonamides and is tolerant of substitution on both coupling partners. Factors which influence the selectivity of C-H functionalization between primary and secondary sites are examined.