Synthesis and Utility of Dihydropyridine Boronic Esters
作者:Santanu Panda、Aaron Coffin、Q. Nhu Nguyen、Dean J. Tantillo、Joseph M. Ready
DOI:10.1002/anie.201510027
日期:2016.2.5
When activated by an acylating agent, pyridine boronicesters react with organometallic reagents to form a dihydropyridineboronicester. This intermediate allows access to a number of valuable substituted pyridine, dihydropyridine, and piperidine products.
Cobalt-catalyzed cross-couplings of nitrogen-containing heterocyclic phosphonium salts with arylmagnesium halides proceeded efficiently with the aid of cobalt(II) catalyst and copper(I) salt in tetrahydrofuran at ambient temperature, producing the desired 4-arylated pyridine, quinoline, and quinoxaline in modest to good yields.
钴催化的含氮杂环鏻盐与芳基卤化镁的交叉偶联在钴 (II) 催化剂和铜 (I) 盐的帮助下在四氢呋喃中在环境温度下有效进行,产生所需的 4-芳基化吡啶、喹啉和喹喔啉产量适中至良好。
Aromatic Vs diene reactivity of 2(1H)-pyridinone and its derivatives