作者:Naruki Tahara、Tsutomu Fukuda、Masatomo Iwao
DOI:10.1016/s0040-4039(02)02318-3
日期:2002.12
4,4-Dimethyl-2-(o-tolyl)oxazolines 1 undergo normal lateral lithiation at the benzylic position by treatment with sec-BuLi in diethyl ether at −78°C. In contrast, metalation of 1 with sec-BuLi/TMEDA in diethyl ether at the same temperature leads to ortho-lithiation at the 6′-position. Rationalization for the unusual ortho-lithiation of 1 is proposed.
通过在-78℃下在
乙醚中用仲-BuLi处理4,
4-二甲基-2-(邻
甲苯基)
恶唑啉1,在苄基位置进行正常的侧向
锂化反应。相反,在相同温度下在
乙醚中用仲-BuLi / TME
DA对1进行
金属化会导致在6'-位发生邻位
锂化。提出了对1的异常正交
锂化的合理化方法。