(E)-4-(3-Cyano-phenyl)-4-oxo-but-2-enoic acid 、 2-((S)-1-Amino-ethyl)-5-methyl-thieno[2,3-d][1,3]oxazin-4-one; compound with trifluoro-acetic acid 在
盐酸-N-乙基-Nˊ-(3-二甲氨基丙基)碳二亚胺 、
N,N-二异丙基乙胺 作用下,
生成
(E)-4-(3-Cyano-phenyl)-4-oxo-but-2-enoic acid [(S)-1-(5-methyl-4-oxo-4H-thieno[2,3-d][1,3]oxazin-2-yl)-ethyl]-amide