Novel and Potent Aldose Reductase Inhibitors: 4-Benzyl- and 4-(Benzothiazol-2-ylmethyl)-3,4-dihydro-3-oxo-2H-1,4-benzothiazine-2-acetic Acid Derivatives.
作者:Tomoji AOTSUKA、Hiroshi HOSONO、Toshio KURIHARA、Yoshiyuki NAKAMURA、Tetsuo MATSUI、Fujio KOBAYASHI
DOI:10.1248/cpb.42.1264
日期:——
A number of 1, 4-benzothiazine-2-acetic acid derivatives (1, 2 and 3) and their bioisosteres (15b, 16, 18 and 20b) were synthesized and evaluated in vitro for the ability to inhibit aldose reductase (AR) in porcine lens. The compounds which exhibited potent activity in vitro were also assayed in vivo for inhibitory activity against sorbitol accumulation in the erythrocytes, sciatic nerve and lens of streptozotocin-diabetic rats. The 4-(substituted benzothiazol-2-ylmethyl)-1, 4-benzothiazine-2-acetic acid derivatives (2 and 3) showed more potent AR inhibitory activity than did the 4-(4-bromo-2-fluorobenzol)-1, 4-benzothiazine-2-acetic acid derivatives (1). 4-(4, 5, 7-Trifluorobenzothiazol-2-ylmethyl)-3, 4-dihydro-3-oxo-2H-1, 4-benzothiazine-2-acetic acid (2q, SPR-210) showed not only a potent AR-inhibitory activity in vitro (IC50 9.5×10-9 M) but also a significant reduction in sorbitol accumulation in rat sciatic nerve (ID50 0.1 mg/kg) and lens (ID50 9.8 mg/kg). Optical resolution of the racemic SPR-210 was achieved by means of a diastereomer salt method using (-)-brucine. The biological activities of both enantiomers, (+)- and (-)-SPR-210, were comparable to that of the racemate.
合成了多种1,4-苯并噻唑-2-乙酸衍生物(1、2和3)及其生物等效物(15b、16、18和20b),并在体外评估其抑制猪眼晶状体醇糖还原酶(AR)的能力。在体外表现出强效活性的化合物,也在体内测定其对链脲菌素糖尿病大鼠的红细胞、坐骨神经和晶状体中甜菜糖积累的抑制活性。4-(取代苯并噻唑-2-亚甲基)-1,4-苯并噻唑-2-乙酸衍生物(2和3)比4-(4-溴-2-氟苯)-1,4-苯并噻唑-2-乙酸衍生物(1)显示出更强的AR抑制活性。4-(4,5,7-三氟苯并噻唑-2-亚甲基)-3,4-二氢-3-氧-2H-1,4-苯并噻唑-2-乙酸(2q, SPR-210)不仅在体外表现出强效的AR抑制活性(IC50 9.5×10^-9 M),而且在大鼠坐骨神经(ID50 0.1 mg/kg)和晶状体(ID50 9.8 mg/kg)中显著降低了甜菜糖的积累。通过使用(-)-布克因的互变异构盐方法实现了消旋体SPR-210的光学分解。两种对映体(+)-和(-)-SPR-210的生物活性与消旋体相当。