[EN] CYCLIC NITROMETHYL ACETIC ACID DERIVATIVES<br/>[FR] DERIVES CYCLIQUES D'ACIDE NITROMETHYL ACETIQUE
申请人:PFIZER LTD
公开号:WO2004031124A1
公开(公告)日:2004-04-15
The invention provides salts of formula (I) wherein X is a basic counterion selected from a group I or group II metal and a primary, secondary or tertiary amine; n is 0, 1 or 2; and Rl, Rla, R2, R2a, R3, R3a, R4 and R4a are independently selected from H and C1-C6 alkyl, or R1 and R2 or R2 and R3 are taken together to form a C3-C7 cycloalkyl ring, which is optionally substituted with one or two substituents selected from C1-C6 alkyl, which are useful as intermediates in the preparation of cyclic and bicyclic amino acids. Processes for the preparation of the final products and for the conversion of the compounds of formula (Ι) to amino acids are included.
该发明提供了公式(I)的盐,其中X是从I族或II族金属和一级、二级或三级胺中选择的一种碱性对离子;n为0、1或2;R1、R1a、R2、R2a、R3、R3a、R4和R4a分别独立地选择自H和C1-C6烷基,或者R1和R2或R2和R3被取在一起形成一个C3-C7环烷基环,该环烷基环可选择地用一个或两个选择自C1-C6烷基的取代基取代,这些盐在环状和双环氨基酸的制备中作为中间体是有用的。包括用于制备最终产物和将公式(I)化合物转化为氨基酸的方法。