New methodology for the synthesis of tetrahydrofuro[3,2-b]furan-2(3H)-one derivatives, synthons of natural products with biological interest
作者:Ángel M. Montaña、Joan A. Barcia、Pedro M. Grima、Gabriele Kociok-Köhn
DOI:10.1016/j.tet.2016.09.004
日期:2016.10
the desired furofuranones with high regio- and stereoselectivity. The new synthetic method is simple, straightforward and versatile, because a wide variety of furofuranones, and with wide molecular diversity, may be prepared by adequately designing the substituents of starting materials. The resulting furofuranones may be potentially derivatized to generate chemical libraries of high molecular diversity
The symmetry breaking of meso primary diols bearing a tetrahydropyran ring was employed, using catalytic asymmetric acyltransfer, to control all‐carbon quaternary stereocenters. The planar chiral Fu DMAP catalyst was used in this reaction to reach a high degree of enantioselectivity (up to 97:3 e.r.) through a synergic effect combining a desymmetrization step and a kinetic resolution. Moreover, a
通过催化不对称酰基转移,利用带有四氢吡喃环的内消旋伯二醇的对称性断裂,来控制所有碳的季立体中心。平面手性Fu DMAP催化剂用于该反应中,通过结合去对称化步骤和动力学拆分的协同效应达到高度的对映选择性(最高达97:3 er)。此外,C 6 F 6溶剂显示出有益的效果,产生了有机催化的不对称酰基转移的第一个实例。经过简单的开环顺序后,解对称的单酯随后用于获得带有全碳四元立体中心的复杂的聚酮化合物构建基。