Base-Promoted One-Pot Sequential Phosphite Addition and 5-exo-dig Cyclization of Enynals: A Facile Route to Trisubstituted Furans
作者:K. Kumara Swamy、Anasuyamma Uravakilli、Ramesh Kotikalapudi
DOI:10.1055/s-0033-1340865
日期:——
using the same substrates leads to a diene product. An easy route for the synthesis of trisubstituted furans has been demonstrated. One-pot sequential phosphite (H-phosphonate) addition to alkynylaldehydes (enynals) promoted by tripotassium phosphate leads to trisubstituted furans (phosphono-furans) via 5-exo-dig cyclization of the phosphono-alkynol intermediates. In contrast, in the presence of silver(I)
摘要 已经证明了合成三取代呋喃的简便方法。由磷酸三钾促进的向炔基醛(烯醛)中加一锅的连续亚磷酸酯(H-膦酸酯)通过膦酰基-炔醇中间体的5-外-环化作用导致三取代的呋喃(膦酰基-呋喃)。相反,在四氟硼酸银(I)的存在下,使用相同底物的反应产生二烯产物。 已经证明了合成三取代呋喃的简便方法。由磷酸三钾促进的向炔基醛(烯醛)中加一锅的连续亚磷酸酯(H-膦酸酯)通过膦酰基-炔醇中间体的5-外-环化作用导致三取代的呋喃(膦酰基-呋喃)。相反,在四氟硼酸银(I)的存在下,使用相同底物的反应产生二烯产物。