Protection of the Benzoxaborole Moiety: Synthesis and Functionalization of Zwitterionic Benzoxaborole Complexes
作者:James M. Gamrat、Giulia Mancini、Sarah J. Burke、Rebecca C. Colandrea、Nicholas R. Sadowski、Bryan C. Figula、John W. Tomsho
DOI:10.1021/acs.joc.8b00677
日期:2018.6.1
incompatible reactions (oxidations, substitutions, and mild reductions) to be achieved in the presence of the benzoxaborole moiety. 3-(N,N-Dimethylamino)-1-propanol was determined to be useful in one-step sequences and is readily cleaved upon workup. Two other groups, N-methylsalicylidenimine and 2-[1-(methylimino)ethyl]phenol, are suitable for multistep syntheses. Deprotection with mild aqueous acid
报道了三个苯并氧杂硼杂环保护基的合成和实用性。这些保护基团提高了有机溶解度,并在存在苯并氧杂硼烷部分的情况下实现了不相容的反应(氧化,取代和轻度还原)。经确定3-(N,N-二甲基氨基)-1-丙醇可用于一步步骤,并且在后处理时容易裂解。另外两个组,N-甲基水杨亚胺和2- [1-(甲基亚氨基)乙基]苯酚适用于多步合成。用弱酸水溶液脱保护可高产率地进行无色谱分离的苯并氧杂硼烷。