PROCEDIMIENTO PARA PREPARAR DERIVADOS DEL ACIDO 2-(4-HIDROXI-2-OXOPIRROLIDIN-ACETICO:INTERMEDIARIOS DE APLICACION EXCLUSIVA EN DICHO PROCEDIMIENTO Y LA PREPARACION DE DICHOS INTERMEDIARIOS.

摘要

A process for preparing compounds (1) (1) where Y is NR1R2 or OR, R1 and R2 are hydrogen or C1-3 alkyl, and R is C1-3 alkyl, which comprises protecting the hydroxy group of a compound (2) (2) cyclising the product under basic conditions and removing the protecting group.