Synthesis and Evaluation of N-acyl-2-(5-Fluorouracil-1-yl)-d,l-Glycine as a Colon-Specific Prodrug of 5-Fluorouracil
作者:Jeoung Soo Lee、Yun Jin Jung、Young Mi Kim
DOI:10.1002/jps.1128
日期:2001.11
N-nicotinyl-2-(5-fluorouracil-1-yl)-D,L-glycine (NFG) and N-isonicotinyl-2-(5-fluorouracil-1-yl)-D,L-glycine (INFG) were synthesized as colon-specific prodrugs of 5-fluorouracil (5-FU). As N-aromatic acyl amides of glycine, they are expected to be stable in the upper intestine and delivered to the colon as an intact form if they are nonabsorbable. Microbial hydrolysis of amide bond in the colon will
N-烟碱基-2-(5-氟尿嘧啶-1-基)-D,L-甘氨酸(NFG)和N-异烟碱基-2-(5-氟尿嘧啶-1-基)-D,L-甘氨酸(INFG)为合成为5-氟尿嘧啶(5-FU)的结肠特异性前药。作为甘氨酸的N-芳族酰基酰胺,如果它们不能被吸收,它们有望在小肠中稳定并以完整的形式传递到结肠。结肠中酰胺键的微生物水解将产生2-(5-氟尿嘧啶)-D,L-甘氨酸,其通过自发分解释放5-FU。NFG和INFG溶于水,在pH 1.2和7.4缓冲溶液中稳定。在37度的1-辛醇/ pH 7.4磷酸盐缓冲溶液中NFG或INFG的表观分配系数分别为0.025或0.024。与大鼠盲肠内容物一起温育后,在8小时内NFG或INFG的转化分别仅进行了9%或5%,产生5-FU和代谢产物。在重氮尿嘧啶(一种二氢尿嘧啶脱氢酶抑制剂)的存在下,代谢物的形成受到抑制。用盲肠内容物孵育5-FU,NFG或INFG后,代谢物的HPLC保留