Allosteric Modulators of the Adenosine A1 Receptor: Synthesis and Pharmacological Evaluation of 4-Substituted 2-Amino-3-benzoylthiophenes
摘要:
A series of 4-substituted 2-amino-3-benzoylthiophenes was screened using a functional assay of A A(1)AR-mediated phosphorylation of ERK 1/2 in intact CHO cells to identify both potential agonistic effects as well the ability to allosterically modulate the activity of the orthosteric agonist, R-PIA. More detailed concentration-response experiments were subsequently performed on two compounds (9a and 9o) utilizing both the ERK 1/2 assay as well as a second assay of [S-35]GTP gamma S binding to activated G proteins.
N-Heterocyclic Carbene-Catalyzed Construction of 1,3,5-Trisubstituted Benzenes from Bromoenals and α-Cyano-β-methylenones
作者:Chun-Lin Zhang、Song Ye
DOI:10.1021/acs.orglett.6b03306
日期:2016.12.16
A direct and efficient approach to 1,3,5-trisubstituted benzenes has been developed via N-heterocycliccarbene-catalyzed [2 + 4] annulation of α-bromoenals and α-cyano-β-methylenones. The reaction worked well for both aryl- and alkylenones.
Direct Assembly of Polysubstituted Naphthalenes via a Tandem Reaction of Benzynes and α-Cyano-β-methylenones
作者:Qiang Wang、Yi An、Guangfen Du、Zhi-Hua Cai、Bin Dai、Lin He
DOI:10.1021/acs.joc.0c01975
日期:2020.11.6
A mild and transition-metal-free benzannulation reaction for the construction of the naphthalene skeleton has been described. Benzynes react with α-cyano-β-alkylenones through a tandem nucleophilic addition/cyclization/aromatization process to afford polysubstituted naphthalenes in 50–94% yields.
The benzonitrile unit is widely found in natural products, pharmaceuticals, and agrochemicals. Synthesis of benzonitriles has received considerable interests from the chemical community over the last few decades. Present synthetic protocols mainly rely on the pre-existing benzene core to install a cyano moiety. A new NHC-catalyzed [4 + 2]-benzannulation protocol is reported to assemble the benzonitrile
DBU-Mediated Construction of 1,3,5-Trisubstituted Benzenes via Annulation of α,β-Unsaturated Carboxylic Acids and α-Cyano-β-methylenones
作者:Chun-Lin Zhang、Zhao-Fei Zhang、Zi-Hao Xia、You-Feng Han、Song Ye
DOI:10.1021/acs.joc.8b01740
日期:2018.10.19
A DBU-mediated synthesis of 1,3,5-trisubstituted benzenes was developed via the [2 + 4] annulation of in situ activated α,β-unsaturatedcarboxylic acids and α-cyano-β-methylenones. The dual role of DBU as Brønsted base and nucleophilic Lewis base is the key for the success of the reaction.