4-(2-bromo-4-chloro-5-methoxyphenethyl)-3,4-dihydro-7-(tetrahydro-2H-pyran-2-yl)-3-hydroxy-2H-pyridazino[4,5-b][1,4]oxazin-8(7H)-one 在
palladium diacetate 1,1'-bis(diphenylphosphino)ferrocene 、
potassium carbonate 作用下,
以
甲苯 为溶剂,
以71%的产率得到9-chloro-10-methoxy-3-(tetrahydro-pyran-2-yl)-6,6a,12,13-tetrahydro-3H-5,7-dioxa-2,3,13a-triaza-benzo[4,5]cyclohepta[1,2-a]naphthalen-4-one