Synthesis of 2-Aryl-1-hydroxyazaindolesand 2-Arylazaindoles via Oxidation of <i>o-</i>Hydroxyaminostyrylpyridines
作者:Daniel Kuzmich、Carol Mulrooney
DOI:10.1055/s-2003-40884
日期:2003.8
are prepared via an oxidation/cyclization of o-hydroxyaminostyrylpyridines with DDQ. Reduction of the N-OH bond affords the corresponding 2-arylazaindoles (1H-pyrrolopyridines). The scope of the cyclization is explored via (i) the condensation of 4-methyl-3-nitropyridine with various aryl aldehydes to afford 2-aryl substituted 6-azaindoles and, (ii) the synthesis of 2-phenyl-4-, 5- and 7-azaindoles.
2-Aryl-1-hydroxyazaindoles (pyrrolopylidin-1-ols) 是通过 DDQ 氧化/环化邻羟基氨基苯乙烯基吡啶来制备的。N-OH 键的还原得到相应的 2-芳氮杂吲哚(1H-吡咯并吡啶)。通过 (i) 4-甲基-3-硝基吡啶与各种芳基醛缩合得到 2-芳基取代的 6-氮杂吲哚和 (ii) 2-苯基-4-, 5 的合成来探索环化的范围- 和 7-氮杂吲哚。