Efficient Preparation of ((3‐Chloro‐2‐fluoro‐phenyl)‐[7‐methoxy‐8‐(3‐morpholin‐4‐yl‐propoxy)‐10,11‐dihydro‐5‐oxa‐2,4,11‐triaza‐dibenzo(a,d)cyclohepten‐1‐yl]‐amine) for In‐Vivo Study
作者:Hu Liu、Leon M. Smith、Yunyu Mao、Weitao Pan、Yong‐Jiang Xu、Sabina Burdzovic‐Wizeman、Matthew A. J. Duncton、Wai C. Wong
DOI:10.1080/00397910500377479
日期:2006.1
Abstract An improved route for the preparation of highly functionalized 5,6‐dihydro‐pyrimido[4,5‐b][1,4]oxazepine 1a in multigram quantities was developed. This new methodology was highlighted by the proper methoxy disposition via a regioselective methylation of 2,4,5‐trihydroxy‐benzaldehyde followed by a magnesium sulfate–promoted cyclization.
摘要 开发了一种用于制备数克数量的高度官能化的 5,6-二氢-嘧啶并 [4,5-b][1,4] 氧氮杂 1a 的改进路线。这种新方法的特点是通过 2,4,5-三羟基-苯甲醛的区域选择性甲基化,然后是硫酸镁促进的环化进行适当的甲氧基处理。