The process is useful for making compounds of the formula I:
wherein R is hydrogen, methyl, or fluoro. Valuable intermediates in this process include:
wherein R is hydrogen, methyl, or fluoro, and L is a leaving group.
该过程适用于制备化合物I的公式:其中R为氢,甲基或
氟。该过程中有价值的中间体包括:其中R为氢,甲基或
氟,而L为一个离去基团。