Click chemistry by microcontact printing on self-assembled monolayers: A structure–reactivity study by fluorescence microscopy
作者:Jan Mehlich、Bart Jan Ravoo
DOI:10.1039/c1ob05187c
日期:——
Microcontactprinting (μCP) has developed into a powerful tool to functionalize surfaces with patterned molecular monolayers. μCP can also be used to induce a chemical reaction between a molecular ink and a self-assembled monolayer (SAM) in the nanoscale confinement between stamp and substrate. In this paper, we investigate the Huisgen 1,3-dipolar cycloaddition, the Diels–Alder cycloaddition and the
seen as precursors of various heterocyclic rings. Although γ-amino-ynones have been used to prepare exocyclic vinylogous amides in the presence of Bronsted acids, we describe here the use of zinc chloride as a weak Lewis acid for their conversion into acetylenic cyclic imines. This reaction, which was attempted for a diverse range of γ-amino-ynones, proved to be robust and efficient in most cases and
A One-Pot Approach to 2-Substituted-2-(Dimethoxyphosphoryl)-Pyrrolidines from Substituted <i>tert</i>-Butyl 4-Oxobutylcarbamates and Trimethyl Phosphite
作者:Zhao-Dan Chen、Wen-Ke Xu、Jia-Ming Guo、Ling Chen、Bang-Guo Wei、Chang-Mei Si、Guo-Qiang Lin
DOI:10.1021/acs.joc.1c00935
日期:2021.9.3
A novel approach to 2-substituted-2-(dimethoxyphosphoryl)-pyrrolidines 7a–7o and 9a–9r has been developed, which features a TMSOTf-mediated one-pot intramolecular cyclization and phosphonylation of substituted tert-butyl 4-oxobutylcarbamates. The major advantages of this method include simple operation under mild reaction conditions, the use of cheap Lewis acid, and good to excellent yields with high