Regio‐ and Diastereoselective Synthesis of Cyclohexadienylborons via an Intermolecular Diels–Alder Reaction of Alkenyl MIDA Boronates with 2‐Pyrones
作者:Wen‐Xin Lv、Zhan Li、E Lin、Ji‐Lin Li、Dong‐Hang Tan、Yuan‐Hong Cai、Qingjiang Li、Honggen Wang
DOI:10.1002/chem.201900011
日期:2019.3.15
An efficient synthesis of highly functionalized cyclohexadienylborons via an inverse electron‐demand Diels–Alder reaction/CO2 extrusion of alkenyl MIDA boronates with 2‐pyrones is outlined. By controlling the reaction temperature, the corresponding C(sp3)‐rich bicyclolactones could also be readily formed. The exo‐selective reactions feature good functional‐group tolerance, broad substrate scope, and
概述了通过逆电子需求Diels-Alder反应/ CO 2挤出烯基MIDA硼酸酯与2吡喃酮,可以高效合成高度官能化的环己二烯基硼。通过控制反应温度,也可以很容易地形成相应的富含C(sp 3)的双环内酯。所述外切-选择性的反应配好官能团耐受性,广泛的底物范围,和优异的区域选择性和非对映选择性。通过一锅法氧化环己二烯基硼导致了带有重要官能团的芳族硼酸盐的构建。证明了C-B键的合成转变。
Ethynyl MIDA boronate: a readily accessible and highly versatile building block for small molecule synthesis
作者:Justin R. Struble、Suk Joong Lee、Martin D. Burke
DOI:10.1016/j.tet.2010.04.020
日期:2010.6
Ethynyl N-methyliminodiacetic acid (MIDA) boronate is a very useful building block for small molecule synthesis. This compound can serve as both a bifunctional acetylene equivalent with the capacity for terminus-selective bis-functionalization and a versatile starting material for the preparation of a wide range of other MIDA boronate building blocks. (C) 2010 Elsevier Ltd. All rights reserved.