The solvent-controlled regioselective synthesis of 3-amino-5-aryl-rhodanines as novel inhibitors of human carbonic anhydrase enzymes
作者:Ebru Bilen Ozer、Cuneyt Caglayan、Sinan Bayindir
DOI:10.1016/j.tet.2022.132896
日期:2022.8
H-bond clusters between water and the amino group of 3-NH2-Rh (1), whereas upon using catalytic amounts of CH3CO2H in pure ethanol the compounds act as an NH2-nucleophile. Moreover, the enzyme inhibition studies of novel 5-Ar-Rhs against cytosolic carbonic anhydrase (hCAs) I, and II isoforms was carried out. As a result of these biological studies, inhibition constants (Ki) for hCA I and hCA II were found
通过绿色方法从 C5 位而不是更亲核的 3-NH 2 -Rh ( 1 ) 的 NH 2进行区域选择性功能化是一个挑战。本研究的主要目标是开发在无催化剂条件下3-NH 2 -Rh ( 1 ) 与NH 2游离罗丹宁( 1 ) 的溶剂促进和控制的区域选择性键烷基化反应。在水作为溶剂的情况下,3-NH 2 -Rh ( 1 ) 与醛的C5-加成芳基化反应有效地产生了C5-芳基化-罗丹宁(5-Ar-Rhs)。另一方面,在乙醇中使用催化量的酸催化剂,3-NH 的反应2 -Rh ( 1 ) 和醛类导致罗丹宁在 NH 位芳基化。水在反应中起两个作用:将 3-NH 2 -Rh ( 1 ) 转化为双齿亲核试剂和激活 3-NH 2 -Rh ( 1 ) 的 C-5 位以通过氢键簇实现 Knoevenagel 缩合。由于水和 3-NH 2 -Rh ( 1 ) 的氨基之间的氢键簇, 3-NH 2 -Rh ( 1 ) 充当