Synthesis of Pyrazines and Quinoxalines via Acceptorless Dehydrogenative Coupling Routes Catalyzed by Manganese Pincer Complexes
作者:Prosenjit Daw、Amit Kumar、Noel Angel Espinosa-Jalapa、Yael Diskin-Posner、Yehoshoa Ben-David、David Milstein
DOI:10.1021/acscatal.8b02208
日期:2018.9.7
Base-metal catalyzed dehydrogenative self-coupling of 2-amino alcohols to selectively form functionalized 2,5-substituted pyrazine derivatives is presented. Also, 2-substituted quinoxaline derivatives are synthesized by dehydrogenative coupling of 1,2-diaminobenzene and 1,2-diols. In both cases, water and hydrogen gas are formed as the sole byproducts. The reactions are catalyzed by acridine-based
提出了2-氨基醇的贱金属催化的脱氢自偶联以选择性地形成官能化的2,5-取代的吡嗪衍生物。另外,通过1,2-二氨基苯和1,2-二醇的脱氢偶联来合成2-取代的喹喔啉衍生物。在两种情况下,水和氢气都是唯一的副产物。该反应由富含稀土的锰的a啶基钳形配合物催化。