Literature DB >> 23959516

N-heterocyclic carbene-catalyzed highly enantioselective synthesis of substituted dihydropyranopyrazolones.

Han-Ming Zhang1, Hui Lv, Song Ye.   

Abstract

Highly optically pure multisubstituted dihydropyrano[2,3-c]pyrazol-6-(1H)-ones were synthesized via the N-heterocyclic carbene-catalyzed enantioselective [4 + 2] annulation of α-chloroaldehydes and pyrazolone-derived oxodienes.

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Year:  2013        PMID： 23959516     DOI： 10.1039/c3ob41455h

Source DB:  PubMed          Journal:  Org Biomol Chem        ISSN： 1477-0520            Impact factor:   3.876


  2 in total

1.  TFA-mediated synthesis of functionalized pyrano[2,3-c]pyrazoles from pyrazol-3-ones, active carbonyl compounds and tert-BuOH.

Authors:  Issa Yavari; Jamil Sheykhahmadi
Journal:  Mol Divers       Date:  2021-03-02       Impact factor: 2.943

2.  Combining silver- and organocatalysis: an enantioselective sequential catalytic approach towards pyrano-annulated pyrazoles.

Authors:  Daniel Hack; Pankaj Chauhan; Kristina Deckers; Yusuke Mizutani; Gerhard Raabe; Dieter Enders
Journal:  Chem Commun (Camb)       Date:  2015-02-11       Impact factor: 6.222
  2 in total

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