Polyhydroquinolines: 1-sulfopyridinium chloride catalyzed an efficient one-pot multicomponent synthesis via Hantzsch condensation under solvent-free conditions
作者:B. Sakram、B. Sonyanaik、K. Ashok、S. Rambabu
DOI:10.1007/s11164-016-2559-y
日期:2016.10
construction of polyhydroquinoline derivatives via one-pot, four-component Hantzsch condensation of various aldehydes, dimedone, ethyl acetoacetate, and ammonium acetate in the presence of an ionic liquid, 1-sulpopyridinium chloride, as a catalyst undersolvent-freeconditions. This methodology has an advantage of high yields, short reaction times, a clean reaction profile, and reusability of the catalyst.
Molybdenum- and Tungsten-Based Coordination Polymers as Catalysts for an Efficient and Rapid Synthesis of Hexahydro-5-oxoquinoline-3-carboxylates and 1,4-Dihydropyridine-3,5-dicarboxylates
rapidly (2 min) in the presence of molybdenum‐ and tungsten‐based coordination polymers [M(Bu3Sn)2O4)]n (M=Mo or W) as catalysts (Schemes 1 and 2; Tables 2 and 3). The products were formed at room temperature in excellent yields (90–98%). The catalysts worked under heterogeneous conditions and were recyclable. The earlier reports for the application of these polymers to conduct organic synthesis are
在基于钼和钨的配位聚合物[M(Bu 3 Sn)2 O 4)] n(M = Mo或W)作为催化剂(方案1和2;表2和3)。产品在室温下以优异的收率(90–98%)形成。催化剂在非均相条件下工作且可回收。这些聚合物用于进行有机合成的早期报道是有限的。本方法探索了这些催化剂的新的有用的应用。