One-Pot Enantioselective Synthesis of Functionalized Pyranocoumarins and 2-Amino-4<i>H</i>-chromenes: Discovery of a Type of Potent Antibacterial Agent
作者:Gen Zhang、Yaohu Zhang、Jiexi Yan、Ru Chen、Shoulei Wang、Yunxia Ma、Rui Wang
DOI:10.1021/jo202020m
日期:2012.1.20
Function-oriented design and synthesis of chiral small molecules with novel activity is a key goal in modern organic chemistry. As multiple antibiotic-resistant pathogens are emerging and causing serious diseases, the need for practical routes for the development of new types of antibacterial agents is very urgent. Herein, we present a highly efficient process for the synthesis of opticallyactive pyranocoumarins
面向功能的设计和具有新颖活性的手性小分子的合成是现代有机化学的主要目标。随着多种对抗生素具有抗药性的病原体的出现并引起严重的疾病,迫切需要开发新型抗菌剂的实用途径。在本文中,我们提出了一种通过有机催化Knoevenagel / Michael /环化序列合成旋光性香豆香豆素和2-氨基-4 H-色烯的高效方法,对这些新型杂环化合物的初步生物学研究表明其具有强大的抗菌活性。这项研究为进一步研究和开发对人类病原体有效的新型抗菌剂提供了一种新的策略。
Organocatalytic Asymmetric Michael Addition of 1,3-Cyclohexanedione to Benzylidenemalonitriles
作者:Chang Won Suh、Dae Young Kim
DOI:10.5012/bkcs.2014.35.1.98
日期:2014.1.20
The organocatalytic enantioselective Michael addition reaction promoted by chiral binaphthyl-modified squaramide catalyst have been developed, allowing facile synthesis of the corresponding chiral 2-amino-4H-chromenes derivatives with excellent enantioselectivity (up to 99% ee). The method reported represents a practical entry for the preparation of chiral 2-amino-4H-chromenes derivatives.