(1) is a natural furanoflavonol derivative isolated from seeds of Pongamia pinnata (L.) Pierre. In this paper, we have accomplished a concise total synthesis of karanjin (1) as well as its natural analogues pongapinnol D (2), 3-hydroxy-6-methoxy-2-phenyl-4H-furo[2,3-h]-1-benzopyran- 4-one (3) and 3,6-dimethoxy-2-phenyl-4H-furo[2,3-h]chromen-4-one (4). One-pot aerobic oxidation was the key step to afford
KaRAnjin (1) 是一种天然的
呋喃黄酮醇衍
生物,从 Pongamia pinnata (L.) Pierre 的种子中分离出来。在本文中,我们完成了 kaRAnjin (1) 及其天然类似物 pongapinnol D (2)、3-hydroxy-6-methoxy-2-phenyl-4H-furo[2,3-h] 的简明全合成-1-苯并
吡喃-4-酮 (3) 和 3,6-二甲氧基-2-苯基-4H-
呋喃[2,3-h]chromen-4-酮 (4)。一锅法有氧氧化是在温和条件下得到
黄酮醇骨架的关键步骤。合成的 1-4 的抗炎特性针对 LPS 刺激的 RAW264.7 细胞中的 NO 产生进行了测定。