| abstract |
compound of the markush formula, use of the compound, reaction processes with acetylating agent and process for preparing a compound the present invention refers to the compounds of the formula (x), and their salts, and their use as intermediates in the manufacturing processes improved for the synthesis of the pharmaceutical compound of formula (i): x is = o, = n-oh or = n-oc (o) me, y is hydrogen, phs- or p-chlorophenylsulfanyl; z is hydrogen or -ch2coor1 where r1 is selected from hydrogen, optionally substituted hydrocarbyl and optionally substituted heterocyclyl. |