Abstract 2-Methylenecephem-1-oxides (4) or -1,1-dioxides (6) can be very conveniently obtained through the use of dimethyl(methylene)imonium salts, which can be prepared in situ or in advance from bis(N,N-dimethylamino)methane (2) and a reactive acid derivative.
摘要 2-亚甲基头孢-1-氧化物(4)或-1,1-二氧化物(6)可以通过使用二甲基(亚甲基)亚
铵盐很方便地获得,其可以原位或预先从双(N ,N-
二甲氨基)
甲烷 (2) 和活性酸衍
生物。