Anti-inflammatory piperazinyl-benzyl-tetrazole derivatives and intermediates thereof
申请人:Pfizer Inc
公开号:US06514975B1
公开(公告)日:2003-02-04
This invention relates to tetrazoles and their pharmaceutically acceptable salts which are selective agonists for the delta opioid receptor, particularly useful in the treatment of inflammatory diseases such as arthritis, psoriasis, asthma, inflammatory bowel disease, disorders or respiratory function, gastrointestinal disorders such as functional bowel disease and functional GI disorders, of formula (I)
wherein R1 is H, C2-C6 alkanoyl, C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl, (C3-C7 cycloalkyl)-(C1-C4 alkyl), (C1-C4 alkoxy)-(C1-C4 alkyl), carboxy-(C1-C4 alkyl), aryl-(C1-C4 alkyl) or heteroaryl-(C1-C4 alkyl); R2 and R3 are each independently H or C1-C4 alkyl; R4 is selected from (i) H, (ii) a group of the formula R6—(CH2)m—Z—(CH2)n—, where m is 0, 1, 2 or 3, n is 1, 2 or 3, Z is a direct link or O, and R6 is —CO2H or —CO2(C1-C4 alkyl), and (iii) a group of formula (a)
where R7 is H or C1-C4 alkyl; and R5 is hydroxy, C1-C4 alkoxy or —NHSO2(C1-C4 alkyl); with the proviso that when Z is O, m is 1, 2 or 3 and n is 2 or 3.
本发明涉及四唑及其药学上可接受的盐,其为δ-阿片受体选择性激动剂,特别适用于治疗炎症性疾病,如关节炎、牛皮癣、哮喘、炎性肠病、呼吸功能障碍、功能性肠病和功能性胃肠疾病等,其化学式为(I),其中R1为H、C2-C6脂肪酰基、C1-C6烷基、C2-C6烯基、C2-C6炔基、(C3-C7环烷基)-(C1-C4烷基)、(C1-C4烷氧基)-(C1-C4烷基)、羧基-(C1-C4烷基)、芳基-(C1-C4烷基)或杂环芳基-(C1-C4烷基);R2和R3各自独立地为H或C1-C4烷基;R4选择自(i) H,(ii) 公式R6-(CH2)m-Z-(CH2)n-,其中m为0、1、2或3,n为1、2或3,Z为直接连接或O,R6为—CO2H或—CO2(C1-C4烷基),以及(iii) 公式(a)中的一个,其中R7为H或C1-C4烷基;R5为羟基、C1-C4烷氧基或—NHSO2(C1-C4烷基);但当Z为O时,m为1、2或3,n为2或3。