The reaction of dichloropyrazines with a dithiane anion gave isomers of the expected formylated chloropyrazines after deprotection with methyl iodide. A tele-substitution mechanism accounts for these observations and is supported by deuterium labelling studies.
二
氯吡嗪与二
噻吩阴离子的反应在用
碘代
甲烷去保护后得到了预期的甲酰化
氯吡嗪的异构体。一个远程3'-取代机制占这些意见,并通过
氘标记研究的支持。