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 P
EG-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)。