Regioselective synthesis of multisubstituted isoquinolones and pyridones via Rh(iii)-catalyzed annulation reactions

2015 ◽  
Vol 51 (97) ◽  
pp. 17277-17280 ◽  
Author(s):  
Liangliang Shi ◽  
Ke Yu ◽  
Baiquan Wang
Keyword(s):  
Regioselective Synthesis ◽  
Diazo Compounds

A mild and efficient Rh(iii)-catalyzed regioselective synthesis of isoquinolones and pyridones from N-methoxybenzamide or N-methoxymethacrylamide and diazo compounds has been developed, through tandem C–H activation, cyclization, and condensation.

Silver-mediated synthesis of novel 3-CF3/CN/phosphonate-substituted pyrazoles as pyrrolomycin analogues from 3-formylchromones and diazo compounds

2019 ◽  
Vol 6 (11) ◽  
pp. 1775-1779 ◽  
Author(s):  
Xiaofeng Peng ◽  
Xiaofei Zhang ◽  
Shunyao Li ◽  
Yunfu Lu ◽  
Lefu Lan ◽  
...  
Keyword(s):  
Regioselective Synthesis ◽  
Diazo Compounds ◽  
Substituted Pyrazoles

Herein, a simple and regioselective synthesis of (2-hydroxyphenyl)(3-(trifluoromethyl/cyano/phosphonate)-1H-pyrazol-5-yl)methanones as pyrrolomycin analogues was reported.

Highly Regioselective Synthesis of 3,5-Substituted Pyrazoles from Bromovinyl Acetals and N-Tosylhydrazones

Synlett ◽  
2020 ◽  
Vol 31 (12) ◽  
pp. 1172-1176
Author(s):  
Phannarath Phansavath ◽  
Virginie Ratovelomanana-Vidal ◽  
Anne Westermeyer ◽  
Quentin Llopis ◽  
Gérard Guillamot
Keyword(s):  
Regioselective Synthesis ◽  
Diazo Compounds ◽  
Dipolar Cycloaddition ◽  
Substituted Pyrazoles

A regioselective synthesis of 3,5-disubstituted pyrazoles was achieved by 1,3-dipolar cycloaddition of diazo compounds, generated in situ from N-tosylhydrazones, with unactivated bromovinyl acetals, which served as alkyne surrogates. The reaction tolerated N-tosylhydrazones bearing various substituted benzylidene groups, and a range of 3,5-disubstituted pyrazoles were obtained in yields of up to 92%.

Regioselective synthesis of functionalized pyrazole-chalcones via a base mediated reaction of diazo compounds with pyrylium salts

2021 ◽  
Author(s):  
Lalita Devi ◽  
Gaurav Sharma ◽  
Ruchir Kant ◽  
Sanjeev K. Shukla ◽  
Namrata Rastogi
Keyword(s):  
Regioselective Synthesis ◽  
Diazo Compounds ◽  
Pyrylium Salts ◽  
Tautomeric Mixture

A base-mediated reaction of triaryl/alkyl pyrylium tetrafluoroborate salts with α-diazo-phosphonates, sulfones and trifluoromethyl compounds affords the corresponding functionalized pyrazole-chalcones as 5-P-5 and 3-P-3 tautomeric mixture.

Regioselective Synthesis of Functionalized Oxime Ethers

2010 ◽  
Vol 7 (6) ◽  
pp. 479-482 ◽  
Author(s):  
Jun Liu ◽  
Dafeng Li ◽  
Jian Li ◽  
Chunju Li ◽  
Xueshun Jia
Keyword(s):  
Regioselective Synthesis

New catalysts for the reduction of aromatic diazo compounds by alcohols to hydrocarbons

1983 ◽  
Vol 32 (4) ◽  
pp. 858-861 ◽  
Author(s):  
V. S. Lenenko ◽  
A. P. Borisov ◽  
V. D. Makhaev ◽  
E. I. Mysov ◽  
V. B. Shur ◽  
...  
Keyword(s):  
Diazo Compounds

Divergent and Regioselective Synthesis of Pyrazolo[1,5-a]pyridines and Imidazo[1,5-a]pyridines

2021 ◽  
Author(s):  
Katrina M. Mennie ◽  
Michael H. Reutershan ◽  
Catherine White ◽  
Bruce Adams ◽  
Bridget Becker ◽  
...  
Keyword(s):  
Regioselective Synthesis
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