Rh-Catalyzed aldehydic C–H alkynylation and annulation
作者:Maddali L. N. Rao、Boddu S. Ramakrishna
DOI:10.1039/c9ob02670c
日期:——
aldehydic C-Hbond alkynylation and annulation for the in situ synthesis of chromones and aurones are described. It involves the sequential aldehydeC-Hbond alkynylation of salicylaldehyde with in situ generated 1-bromoalkyne from 1,1-dibromoalkene followed by annulation. This protocol shows good functional group tolerance including aryl, alkenyl, alkyl and heteroaryl-1,1-dibromoalkenes. The steric/electronic
Transition-metal-free synthesis of polysubstituted pyrrole derivatives <i>via</i> cyclization of methyl isocyanoacetate with aurone analogues
作者:Zhi-Peng Wang、Yun He、Pan-Lin Shao
DOI:10.1039/c8ob01558a
日期:——
Presented herein is an unprecedented transition-metal-free cyclization of methyl isocyanoacetate with aurone analogues catalyzed by NaOH. Various 2,3,4-trisubstituted pyrroles were obtained in excellent yields (up to 99%). The high efficiency of this synthetic procedure, coupled with the operational simplicity and atom economy, makes it an attractive method for the synthesis of polysubstituted pyrroles
Catalytic Asymmetric [3 + 2] Cycloaddition Reaction between Aurones and Isocyanoacetates: Access to Spiropyrrolines via Silver Catalysis
作者:Zhi-Peng Wang、Sichuan Xiang、Pan-Lin Shao、Yun He
DOI:10.1021/acs.joc.8b01622
日期:2018.9.21
The first enantioselective formal [3 + 2] cycloaddition of aurone analogues with isocyanoacetates was developed via chiral Ag-complex catalysis. A variety of optically enriched spiro-1-pyrrolines were obtained in excellent yields, diastero- and enantioselectivities (up to 99% yield, >20:1 dr, >99% ee). This synthetic approach represents an extremely simple, efficient, and atom-economical method for
Attempts to prepare azido-substituted aurones via a copper-catalyzed azidation failed to afford the desired product, but instead resulted in an unusual triazole formation reaction. Further efforts noted that copper was not required for this reaction, but simply thermal treatment with sodium azide in a polar aprotic solvent. A wide range of substitution patterns were tolerated in this reaction to afford
[EN] AURONES AND METHODS OF USING AURONES TO TREAT TUBERCULOSIS<br/>[FR] AURONES ET MÉTHODES D'UTILISATION D'AURONES POUR TRAITER LA TUBERCULOSE
申请人:MIDDLE TENNESSEE STATE UNIV
公开号:WO2020223439A1
公开(公告)日:2020-11-05
This disclosure describes compounds, compositions, and methods for treating or preventing infection or disease including, in some specific embodiments, treating or preventing tuberculosis and/or infection with Mycobacterium tuberculosis (Mtb). In one aspect, this disclosure describes aurones including, for example, aurone 9504, aurone 9505, aurone 9501, aurone 9510, aurone AA2A, and aurone AA8, compositions including aurones, and methods of using aurones for treating or preventing tuberculosis.