摘要 熔融的吡啶并[2,3- c ]香豆素衍生物是通过2-(丙氧基氧基)苯甲醛与3-氨基香豆素的分子内Povarov反应在10摩尔%的三氟甲磺酸作为催化剂存在下于回流的乙腈中制备的。该方案的优点之一是反应时间短,收率好,并且无需进行水后处理和色谱分离。 熔融的吡啶并[2,3- c ]香豆素衍生物是通过2-(丙氧基氧基)苯甲醛与3-氨基香豆素的分子内Povarov反应在10摩尔%的三氟甲磺酸作为催化剂存在下于回流的乙腈中制备的。该方案的优点之一是反应时间短,收率好,并且无需进行水后处理和色谱分离。
作者:Amit A. Kudale、David O. Miller、Louise N. Dawe、Graham J. Bodwell
DOI:10.1039/c1ob05867c
日期:——
A series of pentacyclic heterocyclic systems (15 examples, 69–89%) have been synthesized using intramolecular Povarov reactions involving 3-aminocoumarins and O-cinnamylsalicylaldehydes. The Povarov adducts are formed with high selectivity for the trans,trans relative stereochemistry in the newly-formed [6,6] fused ring system. One example of a Povarov adduct featuring a new [6,5] fused ring system is reported. In this case, cis,trans relative stereochemistry was preferred.
Synthesis of Pyrido[2,3-c]coumarin Derivatives by an Intramolecular Povarov Reaction
作者:Abu Khan、Md. Belal、Deb Das
DOI:10.1055/s-0034-1380131
日期:——
Fused pyrido[2,3-c]coumarin derivatives were prepared by an intramolecular Povarov reaction of 2-(propagyloxy)benzaldehydes with 3-aminocoumarins in the presence of 10 mol% of triflic acid as a catalyst in refluxing acetonitrile. Among the advantages of this protocol are shorter reaction times, good yields, and the absence of the need for aqueous workup and chromatographic separation. Fused pyrido[2,3-c]coumarin
摘要 熔融的吡啶并[2,3- c ]香豆素衍生物是通过2-(丙氧基氧基)苯甲醛与3-氨基香豆素的分子内Povarov反应在10摩尔%的三氟甲磺酸作为催化剂存在下于回流的乙腈中制备的。该方案的优点之一是反应时间短,收率好,并且无需进行水后处理和色谱分离。 熔融的吡啶并[2,3- c ]香豆素衍生物是通过2-(丙氧基氧基)苯甲醛与3-氨基香豆素的分子内Povarov反应在10摩尔%的三氟甲磺酸作为催化剂存在下于回流的乙腈中制备的。该方案的优点之一是反应时间短,收率好,并且无需进行水后处理和色谱分离。