A novel oxazine ring closure reaction affording (Z)-((E)-2-styrylbenzo[b]furo[3,2-d][1,3]oxazin-4-ylideno)acetaldehydes and their anti-osteoclastic bone resorption activity
作者:Yuko Ando、Kumiko Ando、Mami Yamaguchi、Jun-ichi Kunitomo、Masao Koida、Ryo Fukuyama、Hiromichi Nakamuta、Masayuki Yamashita、Shunsaku Ohta、Yoshitaka Ohishi
DOI:10.1016/j.bmcl.2006.08.064
日期:2006.11
method was established using the reaction of 2-acetyl-(E)-3-styrylcarbonylaminobenzo[b]furans (4) with Vilsmeier-Haack-Arnold reagent to afford (E and Z)-((E)-2-styrylbenzo[b]furo[3,2-d][1,3]oxazin-4-ylideno)acetaldehydes (5). (Z)-4-(8-Bromo-(E)-2-styrylbenzo[b]furo[3,2-d][1,3]oxazin-4-ylideno)but-(E)-2-eno ic acid ethyl ester (6b), derived from (Z)-5a, showed significantly potent anti-osteoclastic bone
利用2-乙酰基-(E)-3-苯乙烯基羰基氨基苯并[b]呋喃(4)与Vilsmeier-Haack-Arnold试剂的反应建立了一种新的恶嗪环形成方法,得到(E和Z)-((E)- 2-苯乙烯基苯并[b]呋喃[3,2-d] [1,3]恶嗪-4-亚基)乙醛(5)。(Z)-4-(8-溴-(E)-2-苯乙烯基苯并[b]呋喃[3,2-d] [1,3]恶嗪-4-羟基)但-(E)-2-烯醇衍生自(Z)-5a的丙烯酸乙酯(6b)具有与17β-雌二醇(E2)相当的显着有效的抗破骨性骨吸收活性。