Direct synthesis of highly functionalized furans from donor-acceptor cyclopropanes: Via DBU-mediated ring expansion reactions
A DBU-mediated, unprecedented formal ring expansion reaction of 2-acyl-3-arylcyclopropane-1,1-dicarbonitriles for the synthesis of multisubstituted furan derivatives is reported. This transformation represents the regioselective ring-opening reaction of c
Su, Zhenjie,Xie, Zengyang,Wang, Shan,Luo, Naili,Wang, Cunde
Acyl Radicals from Benzothiazolines: Synthons for Alkylation, Alkenylation, and Alkynylation Reactions
We describe herein a fundamentally new visible light-driven homolytic C-C bond breaking mode for the generation of acyl radicals from C2-acyl-substituted benzothiazolines. The reactive species can be used as versatile synthons for formal radical alkylatio
Li, Lei,Guo, Shan,Wang, Qi,Zhu, Jin
p. 5462 - 5466
(2019/08/01)
First example of organocatalysis by polystyrene-supported PAMAM dendrimers: Highly efficient and reusable catalyst for knoevenagel condensations
This paper describes the first use of polystyrene-supported poly(amidoamine) (PAMAM) dendrimers as heterogeneous basic organocatalysts for carbon-carbon bond formation. Polystyrene-supported PAMAM dendrimers of first, second and third generations have been used as reusable base catalysts in Knoevenagel condensations of carbonyl compounds with active methylene compounds. The reactions proceed in short periods of time and with 100% selectivity. This novel catalyst eliminates the use of aromatic and halogenated solvents, as well as complex purification processes. The catalysts can be recycled ten times. Wiley-VCH Verlag GmbH & Co. KGaA, 2008.
Krishnan, G. Rajesh,Sreekumar, Krishnapillai
supporting information; experimental part
p. 4763 - 4768
(2009/05/07)
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