METHODS FOR PRODUCING PHENYLALANINE DERIVATIVES HAVING A QUINAZOLINEDIONE SKELETON AND INTERMEDIATES FOR PRODUCTION THEREOF
申请人:Kataoka Noriyasu
公开号:US20100204505A1
公开(公告)日:2010-08-12
The present invention provides a method for producing a phenylalanine derivative(s) having a quinazolinedione ring of formula (5), including steps comprising of reacting an acylphenylalanine derivative(s) of formula (1) with a carbonyl group-introducing reagent(s) and a derivative(s) of anthranilic acid to form an asymmetric urea intermediate(s); making the asymmetric urea intermediate(s) into a quinazolinedione compound(s) of formula (4) in the presence of a base(s); and N-alkylating quinazolinedione ring amide of the obtained quinazolinedione compounds with N-alkylation agents. This production method is an industrially applicable method for producing phenylalanine derivatives having a quinazolinedione skeleton, which are compounds highly useful as drugs having α 4 integrin inhibiting activity. In the formulae (1) and (5), R1 represents a phenyl group having a substituent(s) and the like, R2 represents an alkyl group and the like, R3 represents a dialkylamino group and the like, and R4 represents an alkyl group and the like.
本发明提供了一种制备具有公式(5)的喹唑啉二酮环的苯丙氨酸衍生物的方法,包括以下步骤:将公式(1)的酰基苯丙氨酸衍生物与羰基引入试剂和蒽酸衍生物反应,形成不对称脲中间体;在碱的存在下将不对称脲中间体制成公式(4)的喹唑啉二酮化合物;并用N-烷基化试剂对所得喹唑啉二酮化合物的喹唑啉二酮环酰胺进行N-烷基化。该制备方法是一种工业上适用的制备苯丙氨酸衍生物的方法,这些衍生物具有α4整合素抑制活性,是非常有用的药物化合物。在公式(1)和(5)中,R1代表具有取代基等的苯基,R2代表烷基等,R3代表二烷基胺基等,R4代表烷基等。