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El invento se refiere a un compuesto de la fórmula I (gráfico), y a procedimientos para preparar ciertos intermedios de la fórmula (gráfico), en la que R1 es nitro, amino o amino protegido; R2 es H, fluoro, cloro, CF3, nitro, alquilo(C1-C4), alcoxi(C1-C4), amino o amino protegido; y X1 es OH o un grupo saliente adecuado, usado en este procedimiento . La invención también se refiere a nuevos compuestos de la fórmula (II).The invention relates to a compound of formula I (graph), and to processes for preparing certain intermediates of formula (graph), wherein R1 is nitro, amino or protected amino; R2 is H, fluoro, chloro, CF3, nitro, (C1-C4) alkyl, (C1-C4) alkoxy, amino or protected amino; and X1 is OH or a suitable leaving group, used in this procedure. The invention also relates to new compounds of formula (II).
ECSP9723121997-11-141997-11-14
PROCEDURE FOR SUBSTITUTED PIRIDINES
ECSP972312A
(en)