Furan Ring Opening - Pyridine Ring Closure: An Efficient Approach towards 6<i>H</i>
-Isochromeno[4,3-<i>b</i>
]pyridin-6-ones from Readily Available Furans and Phthalaldehydic Acid Methyl Esters
作者:Pavel M. Shpuntov、Alexandra A. Kolodina、Maxim G. Uchuskin、Vladimir T. Abaev
DOI:10.1002/ejoc.201701355
日期:2018.1.31
Straightforward functionalization of furans by means of a three‐component Mannich‐type condensation reaction with methyl 2‐formylbenzoates and carbamates was accomplished. The synthetic utility of the resultant N‐Boc arylfurfurylamines was demonstrated by a practical two‐step strategy that leads to 6H‐isochromeno[4,3‐b]pyridin‐6‐ones, which are used as cyclometalating ligands for OLEDs.
通过三组分曼尼希型缩合反应与2-甲酰基苯甲酸甲酯和氨基甲酸酯的合成,呋喃得到了简单的官能化。将所得物的合成的效用Ñ -Boc arylfurfurylamines用实际两步策略证明导致6 ħ -isochromeno [4,3- b ]吡啶-6-酮,其被用作环金属配体的OLED。