INDOLINE DERIVATIVE AND PROCESS FOR PRODUCING THE SAME

摘要

Novel intermediates represented by the following formulae (I) and (II) which are useful for synthesizing an indoline derivative having excellent ACAT inhibitory activity; and a process for producing the intermediates. (I) (II) (In the formulae, R1 represents an amino-protecting group; R?2 and R3¿ are the same or different and each represents lower alkyl; and R4 represents hydrogen or a carboxy-protecting group.)