One‐Pot Synthesis of Diazirines and
<sup>15</sup>
N
<sub>2</sub>
‐Diazirines from Ketones, Aldehydes and Derivatives: Development and Mechanistic Insight
作者:Quentin Ibert、Madeleine Cauwel、Thomas Glachet、Tony Tite、Patricia Le Nahenec‐Martel、Jean‐François Lohier、Pierre‐Yves Renard、Xavier Franck、Vincent Reboul、Cyrille Sabot
DOI:10.1002/adsc.202100679
日期:2021.9.21
Broad scope one-pot diazirine synthesis strategies have been developed using two different oxidants depending on the nature of the starting material. In all cases, an inexpensive commercial solution of ammonia (NH3) in methanol (MeOH) was employed, avoiding the difficult use of liquid ammonia. With aliphatic ketones, t-butyl hypochlorite (t-BuOCl) was found to be the best oxidant whereas it is preferable
根据起始材料的性质,使用两种不同的氧化剂开发了广泛的一锅二氮嗪合成策略。在所有情况下,均采用廉价的商业氨 (NH 3 ) 甲醇 (MeOH) 溶液,避免了使用液氨的困难。对于脂肪族酮,发现次氯酸叔丁酯 ( t- BuOCl) 是最好的氧化剂,而最好使用带有芳香族酮、醛和亚胺的二乙酸苯碘酯 (PIDA)。亚胺保护基团的性质是必不可少的,只有叔丁基亚胺允许合成15 N 2 -二氮杂环和完整的15N 掺入,强调反应机制中的关键转亚胺化步骤。这些方法操作简单,对大多数官能团都具有耐受性,提供了产率在 20% 到 99% 之间的二氮嗪。