AbstractA literature survey showed that different derivatives with the 9‐phenyl‐9H‐carbazole or the dihydroindoline scaffold may be of biological activity including cytotoxic effect. Driven by this experience, P‐functionalized derivatives of these N‐heterocycles were synthesized. Three N‐heterocycles, 9‐(4‐bromophenyl)‐9H‐carbazole, 3‐bromo‐9‐phenyl‐9H‐carbazole and 1‐(5‐bromoindolin‐1‐yl)ethan‐1‐one, were coupled with dialkyl phosphites and diarylphosphine oxides using Pd(OAc)2 (10 %) as the catalyst precursor and triethylamine as the base in ethanol under microwave irradiation. The excess of the Y2P(O)H reagent (Y=alkoxy, aryl) (30 %) served as the P‐ligand in its trivalent tautomeric form (Y2POH), hence there was no need for the usual P‐ligands meaning cost and environmental burden. Hence, the presented method is a “green” approach that proved to be more efficient than the preparation by the traditional method. The products, dialkyl phosphonates and tertiary phosphine oxides obtained in 58–84 % yields were characterized, one of them also by single crystal X‐ray analysis, and were subjected to in vitro biological activity evaluation. A (carbazol)yl‐phenylphosphonate, an N‐phenyl‐(carbazol)yl‐phosphonate, a (carbazol)yl‐phenylphosphine oxide and an N‐phenyl‐(carbazol)ylphosphine oxide revealed a significant cytotoxic activity on A549 human non‐small‐cell lung carcinoma and MonoMac‐6 acute monocytic leukemia cancer cells. The cytotoxic effect was significant as compared to that of the reference compounds.
摘要 文献调查显示,具有 9-苯基-9H-咔唑或二氢吲哚啉支架的不同衍生物可能具有生物活性,包括细胞毒性作用。在这一经验的推动下,我们合成了这些 N-杂环的 P-官能化衍生物。在微波辐照下,以 Pd(OAc)2 (10 %) 为催化剂前体,以三乙胺为碱,在乙醇中将 9-(4-溴苯基)-9H-咔唑、3-溴-9-苯基-9H-咔唑和 1-(5-溴吲哚啉-1-基)乙-1-酮这三种 N-杂环与二烷基亚磷酸盐和二芳基膦氧化物偶联。过量的 Y2P(O)H 试剂(Y=烷氧基、芳基)(30%)以其三价同分异构形式(Y2POH)作为 P 配体,因此无需使用通常的 P 配体,这意味着成本和环境负担。因此,所介绍的方法是一种 "绿色 "方法,事实证明比传统方法更有效。以 58-84% 的收率获得的产品、二烷基膦酸盐和叔膦氧化物的特征,其中一种还通过了单晶 X 射线分析,并进行了体外生物活性评估。一种(咔唑)酰基苯基膦酸盐、一种 N-苯基-(咔唑)酰基膦酸盐、一种(咔唑)酰基苯基氧化膦和一种 N-苯基-(咔唑)酰基氧化膦对 A549 人类非小细胞肺癌和 MonoMac-6 急性单核细胞白血病癌细胞具有显著的细胞毒活性。与参考化合物相比,其细胞毒性效果显著。