Design and synthesis of novel methylene-bis-fused pyrazoles as biologically active molecules
作者:Ch. Sanjeeva Reddy、A. Srinivas、M. Sunitha、A. Nagaraj
DOI:10.1002/jhet.474
日期:2010.11
A series of novel methylene‐bis‐fused pyrazoles 12a, 12b, 12c, 12d and methylene‐bis‐2‐(4‐methylsulfonyl)‐phenyl substituted fused pyrazoles 15a, 15b, 15c, 15d have been synthesized by the reaction of methylene‐bis‐aryl‐6‐hydroxymethylene‐2‐cyclohexenones 10 with hydrazine hydrate or (4‐methylsulfonyl)‐phenyl hydrazine 13. Chemical structures of all the newly synthesized compounds were elucidated by
通过亚甲基双反应合成了一系列新颖的亚甲基双稠合吡唑12a,12b,12c,12d和亚甲基双2-2-(4-甲基磺酰基)苯基取代的稠合吡唑15a,15b,15c,15d。双芳基-6-羟基亚甲基-2-环己烯酮10与水合肼或(4-甲基磺酰基)-苯基肼13。通过IR,1 H NMR,13 C NMR和MS光谱数据阐明了所有新合成化合物的化学结构。化合物15a,15b,评价了15c和15d的环氧合酶-2(COX-2)抑制活性,化合物15b表现出明显的COX-2抑制作用和选择性。此外,还对所有新化合物针对革兰氏阳性,革兰氏阴性细菌和真菌的抗菌活性进行了筛选。在筛选出的化合物中,发现12c,15a和15b对几乎所有测试细菌的活性最高。化合物15b对枯草芽孢杆菌(ATCC 6633),金黄色葡萄球菌(ATCC 6538p),黄球菌(IFC 12708),普通变形杆菌(ATCC 3851)和鼠伤寒沙门氏菌(ATCC