Synthesis of benzo[b]thieno[2,3-c]quinolines via palladium-catalyzed ring-closing reaction
作者:Dóra Gábor、Tímea Szabó、György Keglevich、Mátyás Milen
DOI:10.1016/j.tetlet.2022.154298
日期:2023.1
Benzo[b]thieno[2,3-c]quinolines were synthesized via Pd-catalyzed ring closure reaction of the α-aminophosphonates obtained by the Kabachnik–Fields condensation of benzo[b]thiophene-2-carboxaldehydes, 2-iodoanilines and diethyl phosphite or dibenzyl phosphite. The intramolecular cyclizations remained incomplete under the conditions applied. The products were isolated in 11–42% yields, and the unreacted
苯并[ b ]噻吩并 [2,3- c ] 喹啉是通过Pd 催化的 α-氨基膦酸酯的闭环反应合成的亚磷酸酯或亚磷酸二苄酯。在所应用的条件下,分子内环化仍然不完整。产物以 11-42% 的收率分离,未反应的原料从反应混合物中回收。