This invention relates a process for preparing a compound of formula (I)
1
wherein R
1
is para-nitrobenzyl or allyl; and X is halo, which is useful to prepare 3-cyclic-ether-substituted cephalosporins, from trimethylphosphinic compounds. This invention also relates to compounds useful in such process.
本发明涉及一种制备公式(I)化合物的方法
1
其中R
1
是对硝基苄基或烯丙基;X是卤素,可用于从
三甲基膦化合物制备3-
环醚取代
头孢菌素。本发明还涉及在这种过程中有用的化合物。