Borane-amines undergo exclusive monoacetoxylation to trifluoroacetoxyborane-amines (TFAB-amines), which serve as chemoselective reagents for direct reductive amination of aldehydes and ketones. TFAB-NEt3 has been established as mild and highly selective compared to widely-used NaBH3CN and Na(AcO)3BH, even at higher temperatures with challenging substrates. A mechanism involving polyaminoborane formed
                                    硼烷胺经过独家的单乙酰氧基化反应生成三
氟乙酰氧基
硼烷胺 (TFAB-amines),作为醛和酮的直接还原胺化的
化学选择性试剂。与广泛使用的 NaBH 3 CN 和 Na(AcO) 3 BH 相比, TFAB - NEt 3已被证实具有温和性和高选择性,即使在具有挑战性底物的较高温度下也是如此。已经描述了涉及通过TFAB - NH 3的脱氢乙酰氧基化形成的聚
氨基
硼烷的机理。