Synthetic Route for New (Z)-5-[4-(2-Chloroquinolin-3-yl) Methoxy]benzylidinethiazolidine-2,4-diones
作者:Dhanaji V. Jawale、Umesh R. Pratap、Ramrao A. Mane
DOI:10.5012/bkcs.2011.32.7.2171
日期:2011.7.20
Synthetic route has been developed for the synthesis of new (Z)-5-[4-(2-chloroquinolin-3-yl) methoxy]benzyl-idinethiazolidine-2,4-diones (6a-h) starting from 2-chloro-3-hydroxymethyl quinolines (2a-h). The hydroxy methyl quinolines on tosylation yielded (3a-h). Condensation of the tosyl intermediates with 4-hydroxy benzaldehydes has been carried in DMF in presence of $K_2CO_3$ and obtained 4-quinolinyl methoxy benzaldehydes (4a-h). Conveniently Knoevenagel condensation of quinolinyl methoxy benzaldehydes (4a-h) and 2, 4-thiazolidinedione (5) has been carried in PEG-400 in presence of L-proline and obtained better yields of the titled compounds (6a-h).
以 2-氯-3-羟甲基喹啉(2a-h)为起点,开发了合成新的(Z)-5-[4-(2-氯喹啉-3-基)甲氧基]苄基-idinethiazolidine-2,4-二酮(6a-h)的合成路线。羟甲基喹啉经对甲苯磺酰化后得到(3a-h)。在 $K_2CO_3$ 存在下,在 DMF 中将对甲苯基中间体与 4-羟基苯甲醛缩合,得到 4-喹啉基甲氧基苯甲醛(4a-h)。在 L-脯氨酸存在下,在 PEG-400 中方便地进行了喹啉基甲氧基苯甲醛(4a-h)和 2,4-噻唑烷二酮(5)的 Knoevenagel 缩合反应,得到了产率更高的标题化合物(6a-h)。