Cobalt(II)-Catalyzed Electrophilic Alkynylation of 1,3-Dicarbonyl Compounds To Form Polysubstituted Furans<i>via</i>π-π Activation
作者:Irwan Iskandar Roslan、Jiulong Sun、Gaik-Khuan Chuah、Stephan Jaenicke
DOI:10.1002/adsc.201400857
日期:2015.3.9
Polysubstituted furans were obtained with excellent yields via the electrophilic alkynylation of 1,3‐dicarbonyl compoundsws with phenyl‐ or ester‐substituted brominated alkynes. The reaction is catalyzed by the inexpensive and readily available catalyst, cobalt(II) chloride, and has a wide substrate scope. The C(sp)C(sp3) coupling occurs under mild conditions with short reaction times and does not
Auto-Tandem Catalysis-Induced Synthesis of Trisubstituted Furans through Domino Acid-Acid-Catalyzed Reaction of Aliphatic Aldehydes and 1,3-Dicarbonyl Compounds by using<i>N</i>-Bromosuccinimide as Oxidant
作者:Wenbo Huang、Changhui Liu、Yanlong Gu
DOI:10.1002/adsc.201700074
日期:2017.6.6
A simple aluminium(III) chloride‐catalyzed synthesis of tri‐substitutedfurans from aliphatic aldehydes and 1,3‐dicarbonyl compounds was developed by using N‐bromosuccinimide (NBS) as an oxidant. This method was effective for the synthesis of various furan derivatives. Some of the products were not accessible with the previously reported methods. Mechanically, this reaction involved an auto‐tandem