作者:Andrew M. McKinney、Kevin R. Jackson、Ralph Nicholas Salvatore、Elena-Maria Savrides、Mary Jane Edattel、Terrence Gavin
DOI:10.1002/jhet.5570420546
日期:2005.7
Mono and di-substituted alkyl and aryl quinoxalines are rapidly reduced in high yield to their respective 1,2,3,4-tetrahydro-derivatives by borane in THF solution. In the case of the 2,3-di-substituted compounds, reduction is stereoselective yielding exclusively the cis-isomers. Sodium borohydride in acetic acid also reduces alkyl and aryl quinoxalines, but proceeds with lower yields and often produces
在THF溶液中,硼烷将单和二取代的烷基和芳基喹喔啉迅速高产率地还原成它们各自的1,2,3,4-四氢衍生物。在2,3-二取代的化合物的情况下,还原是立体选择性的,仅产生顺式异构体。乙酸中的硼氢化钠也可以还原烷基和芳基喹喔啉,但收率较低,经常产生副产物。乙醇中的硼氢化钠可高产率还原喹喔啉和2-甲基喹喔啉;然而,该反应非常缓慢,而2,3-二烷基和2-芳基喹喔啉在乙醇中不能被硼氢化钠有效还原。