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Published in 2017 at "Chemistry of Heterocyclic Compounds"
DOI: 10.1007/s10593-017-2143-4
Abstract: Aroylmethyl esters of 4-formylpyrazole-3-carboxylic acids underwent intramolecular cyclocondensation in the presence of sodium acetate in refluxing acetic anhydride, giving moderate yields of 5-aroylpyrano[3,4-с]pyrazol-7(2Н)-ones.
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Keywords:
pyrazoles synthesis;
aroylpyrano pyrazol;
synthesis aroylpyrano;
polyfunctional pyrazoles ... See more keywords
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Published in 2019 at "Tetrahedron Letters"
DOI: 10.1016/j.tetlet.2019.01.021
Abstract: Abstract For the very first time furo[3,2-c]pyrazoles have been prepared starting from pyrazole building blocks instead from furanes. During this synthesis effort two previously unknown heterocyclic scaffolds have been discovered, the furo[3,2-c]pyrazol-6-ones and the 2-cyano-3-aminofuran-4-ones.
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Keywords:
synthesis derivatization;
pyrazol ones;
furo pyrazol;
first synthesis ... See more keywords
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Published in 2022 at "RSC Advances"
DOI: 10.1039/d2ra05088a
Abstract: An efficient organocatalytic conjugated addition reaction of pyrazol-3-ones with 3-trifluoroethylidene oxindoles has been developed for the synthesis of enantioenriched triflouromethylated indolin-2-ones bearing adjacent tertiary chiral centers in good yields and good to excellent diastereo- and…
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Keywords:
addition;
ones trifluoroethylidene;
squaramide catalyst;
pyrazol ones ... See more keywords