A series of novel sulfonamides incorporating phenylacrylamido functionalities were synthesized and investigated for the inhibition of the metalloenzyme carbonic anhydrase (CA, EC 4.2.1.1). The physiologically and pharmacologically relevant human (h) isoforms hCA I and II (cytosolic isozymes), as well as the transmembrane tumor-associated hCA IX and XII were included in the study. These compounds showed low nanomolar or sub-nanomolar inhibition constants against hCA II (K_Is in the range of 0.50–50.5 nM), hCA IX (K_Is of 1.8–228.5 nM), and hCA XII (K_Is of 3.5–96.2 nM) being less effective as inhibitors of the off target isoform hCA I. A detailed structure–activity relationship study demonstrates that the nature and position of substituents present on the aromatic part of the scaffold strongly influence the inhibition of CA isoforms. As hCA II, IX and XII are involved in pathologies such as glaucoma and hypoxic, and metastatic tumors, compounds of the type reported in this work may be useful preclinical candidates.

合成了一系列结合了苯基丙烯酰胺基官能团的新型磺酰胺，并研究了其对金属酶碳酸酐酶的抑制作用（CA，EC 4.2.1.1）。生理和药理学相关的人类（h）亚型hCA I和II（胞质同工酶），以及与跨膜肿瘤相关的hCA IX和XII也包括在研究中。这些化合物对hCA II（K _I s在0.50-50.5 nM范围内），hCA IX（K _I s在1.8-228.5 nM范围内）和hCA XII（K _I3.5-96.2 nM s）作为脱靶同工型hCA I抑制剂的效果较差。详细的结构-活性关系研究表明，在支架的芳香部分存在的取代基的性质和位置强烈影响对CA同工型的抑制。由于hCA II，IX和XII参与了诸如青光眼和低氧以及转移性肿瘤等病理过程，因此这项工作中报道的这类化合物可能是有用的临床前候选药物。