1,2,3-trimethylpiperazine 、 tert-butyl (6aR)-4-chloro-1-fluoro-3-(2-fluoro-6-hydroxyphenyl)-12-oxo-6a,7,9,10-tetrahydro-12H-pyrazino[2,1-c]pyrido[3,4-f][1,4]oxazepine-8(6H)-carboxylate 在
N,N-二异丙基乙胺 作用下,
以
乙腈 为溶剂,
以62 %的产率得到tert-butyl (6aR)-4-chloro-3-(2-fluoro-6-hydroxyphenyl)-12-oxo-1-(2,3,4-trimethylpiperazin-1-yl)-6a,7,9,10-tetrahydro-12H-pyrazino[2,1-c]pyrido[3,4-f][1,4]oxazepine-8(6H)-carboxylate