Enantioselective Alkynylation of Unstabilized Cyclic Iminium Ions
作者:Weiye Guan、Samantha O. Santana、Jennie Liao、Kelci Henninger、Mary P. Watson
DOI:10.1021/acscatal.0c04223
日期:2020.12.4
An enantioselectivecopper-catalyzedalkynylation of unstabilized cyclic iminium ions has been developed. Whereas such alkynylations typically utilize pyridinium, quinolinium, and isoquinolinium intermediates, this method enables use of cyclic iminium ions unstabilized by resonance. With the use of a Lewis acid and copper catalyst, these iminium ions are generated in situ from readily available hemiaminal
Electrochemical Deallylation of α-Allyl Cyclic Amines and Synthesis of Optically Active Quaternary Cyclic Amino Acids
作者:Peter G. Kirira、Masami Kuriyama、Osamu Onomura
DOI:10.1002/chem.200903512
日期:2010.4.6
Electrochemical oxidation of α‐allylated and α‐benzylated N‐acylated cyclic amines by using a graphite anode easily affords the corresponding α‐methoxylated products with up to 76 % yield. Ease of oxidation was affected by the type of electrode, the size of cyclic amine, and the nature of the protecting group. This method was successfully applied to the synthesis of optically active N‐acylated α‐alkyl‐α‐amino
Expedient Preparation of Nazlinine and a Small Library of Indole Alkaloids Using Flow Electrochemistry as an Enabling Technology
作者:Mikhail A. Kabeshov、Biagia Musio、Philip R. D. Murray、Duncan L. Browne、Steven V. Ley
DOI:10.1021/ol502201d
日期:2014.9.5
An expedient synthesis of the indole alkaloid nazlinine is reported. Judicious choice of flow electrochemistry as an enabling technology has permitted the rapid generation of a small library of unnatural relatives of this biologically active molecule. Furthermore, by conducting the key electrochemical Shono oxidation in a flow cell, the loading of electrolyte can be significantly reduced to 20 mol