已经证明了 α-硼烯胺和烯酰胺在氮杂环合成中的使用。硼烯胺可以很容易地获得相应的 α-卤代醛,这些醛经过区域选择性环化形成硼化噻唑。缩合/酰胺化序列将 α-硼醛转化为稳定的 α-硼烯酰胺,而不会伴随 C → N 迁移。我们还表明,钯催化的 α-硼烯酰胺环化导致合成通用的异吲哚酮。这些分子随后可用于访问多环支架。
Synthesis of Aminoboronic Acid Derivatives from Amines and Amphoteric Boryl Carbonyl Compounds
作者:Diego B. Diaz、Conor C. G. Scully、Sean K. Liew、Shinya Adachi、Piera Trinchera、Jeffrey D. St. Denis、Andrei K. Yudin
DOI:10.1002/anie.201605754
日期:2016.10.4
Herein, we demonstrate the use of α‐boryl aldehydes and acyl boronates in the synthesis of aminoboronic acid derivatives. This work highlights the untapped potential of boron‐substituted iminium ions and offers insights into the behavior of N‐methyliminodiacetyl (MIDA) boronates during condensation and tautomerization processes. The preparative value of this contribution lies in the demonstration that