作者:Dariusz Deredas、Bartosz Łągiewka、Waldemar Maniukiewicz
DOI:10.1016/j.tetlet.2019.01.022
日期:2019.2
A strategically new approach to 9-substituted 2,3,4,9-tetrahydro-1H-xanthen-1-ones is described. The protocol includes TMG promoted, conjugate addition of cyclohexane-1,3-diones to 3-(diethoxyphosphoryl)coumarins and a domino transesterification-cyclodehydration reaction of the adducts obtained. Modification of the tetrahydroxanthenone at position 9 is reported for the first time.
描述了一种策略上新颖的9-取代的2,3,4,9-四氢-1 H-黄嘌呤-1-酮的方法。该方案包括TMG促进的,将环己烷-1,3-二酮共轭添加到3-(二乙氧基磷酰基)香豆素中,以及获得的加合物的多米诺酯交换-环脱水反应。首次报道了在位置9对四氢黄酮的修饰。