Potential antiinflammatory agents. IV. Stereoselective synthesis of 6-chloro-5-(3'- and 4'-hydroxycyclohexyl)indan-1-carboxylic acids related to metabolites of 6-chloro-5-cyclohexylindan-1-carboxylic acid (TAI-284).
作者:SHOJI KISHIMOTO、TETSUYA AONO、YOSHIAKI ARAKI、ISAO MINAMIDA、KUNIHIRO TANAKA、SHUNSAKU NOGUCHI
DOI:10.1248/cpb.22.2231
日期:——
In the course of synthetic study of metabolites of a new potent antiinflammatory agent, 6-chloro-5-cyclohexylindan-1-carboxylic acid (TAI-284), 5-(cis-and trans-3'-hydroxy-cyclohexyl) indan-1-carboxylic acids (25 and 26) and 5-(cis- and trans-4'-hydroxycyclohexyl) indan-1-carboxylic acids (17 and 16) were stereoselectively prepared by sodium borohydride reduction (equatorial alcohol formation) and catalytic hydrogenation (axial alcohol formation) of the corresponding 3'-oxo and 4'-oxo compounds (24 and 15), respectively. Chlorination of 25, 26, 17 and 16 with molecular chlorine in acetonitrile gave their 6-chloro derivatives (27, 28, 21 and 20), which were correlated with metabolites of TAI-284. Of these indans, 3'-hydroxy compounds (25-28) were prepared as a pair of racemic diastereoisomers.
在合成研究一种新型强效抗炎剂--6-氯-5-环己基茚满-1-羧酸(TAI-284)的代谢物的过程中、通过硼氢化钠还原相应的 3'-氧代和 4'-氧代化合物(24 和 15)(形成赤道醇)和催化加氢(形成轴醇),分别立体选择性地制备了 5-(顺式和反式-3'-羟基-环己基)茚满-1-羧酸(25 和 26)和 5-(顺式和反式-4'-羟基-环己基)茚满-1-羧酸(17 和 16)。在乙腈中用分子氯将 25、26、17 和 16 氯化,得到了它们的 6-氯衍生物(27、28、21 和 20),这些衍生物与 TAI-284 的代谢物有关。在这些茚满物中,3'-羟基化合物(25-28)是以一对外消旋非对映异构体的形式制备的。