it is the location of three of the world 펨 derivatives manufacturing method

摘要

this invention is a chemical to a c - 3 position of the value of the three ud3a8 derivatives (Cephem derivatives) thiazole lin - i t d in (thiazoline - azetidinone) compounds as raw materials, manufacturing methods, and about three ud3a8 induction body, the external system (uc138ud314. cephalosphorins) antibiotics the creation of intermediate, a useful substance.;in the method, x is cl. R1 is, PhCH2CO -, PhOCH2CO - or hydrogen atom, and R2 means, the two benzene methyl (DPM), t must be the sites at time (t - BOC), do not see the car, benzyl, methyl, p (CBZ) pa city (PMB - (benzyl), p - nitro benzyl (PNB) or it can pay.