The invention relates to compounds of formula (X), and salts thereof, and their use as intermediates in improved manufacturing processes for the synthesis of pharmaceutical compound of formula (I): X is =0, =N-0H or =N-OC(O)Me; Y is hydrogen, PhS- or p-chlorophenylsulfanyl; Z is hydrogen or -CH2COOR1 wherein R1 is selected from hydrogen, optionally substituted hydrocarbyl and optionally substituted heterocyclyl.
这项发明涉及公式(X)的化合物及其盐,以及它们作为公式(I)的药物化合物合成改进制造过程中的中间体的用途:X为=0,=N-0H或=N-OC(O)Me;Y为氢,PhS-或对
氯苯硫基;Z为氢或-CH2COOR1,其中R1从氢、可选择取代的烃基和可选择取代的杂环烷基中选择。