Literature DB >> 16719448

Pt-catalyzed tandem epoxide fragmentation/pentannulation of propargylic esters.

Brian G Pujanauski1, B A Bhanu Prasad, Richmond Sarpong.   

Abstract

A Pt-catalyzed pentannulation of propargylic esters containing an epoxide moiety has been developed. The present transformation achieves the formation of cyclopentenone products as single diastereomers in good yields. The observed products likely form from pyran intermediates that undergo an oxa-6pi electrocyclic ring opening to a functionalized dienone, followed by ring closure with an accompanying acyl shift.

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Year:  2006        PMID： 16719448     DOI： 10.1021/ja061549m

Source DB:  PubMed          Journal:  J Am Chem Soc        ISSN： 0002-7863            Impact factor:   15.419


  11 in total

1.  Pt-catalyzed cyclization/migration of propargylic alcohols for the synthesis of 3(2H)-furanones, pyrrolones, indolizines, and indolizinones.

Authors:  Eric M Bunnelle; Cameron R Smith; Sharon K Lee; Surendra W Singaram; Allison J Rhodes; Richmond Sarpong
Journal:  Tetrahedron       Date:  2008-02-28       Impact factor: 2.457

2.  Rhodium-catalyzed intra- and intermolecular [5 + 2] cycloaddition of 3-acyloxy-1,4-enyne and alkyne with concomitant 1,2-acyloxy migration.

Authors:  Xing-Zhong Shu; Xiaoxun Li; Dongxu Shu; Suyu Huang; Casi M Schienebeck; Xin Zhou; Patrick J Robichaux; Weiping Tang
Journal:  J Am Chem Soc       Date:  2012-03-12       Impact factor: 15.419

3.  Interception of a Rautenstrauch intermediate by alkynes for [5+2] cycloaddition: rhodium-catalyzed cycloisomerization of 3-acyloxy-4-ene-1,9-diynes to bicyclo[5.3.0]decatrienes.

Authors:  Xing-zhong Shu; Suyu Huang; Dongxu Shu; Ilia A Guzei; Weiping Tang
Journal:  Angew Chem Int Ed Engl       Date:  2011-07-11       Impact factor: 15.336

4.  Synthesis of highly functionalized cyclohexenone rings: rhodium-catalyzed 1,3-acyloxy migration and subsequent [5+1] cycloaddition.

Authors:  Dongxu Shu; Xiaoxun Li; Min Zhang; Patrick J Robichaux; Weiping Tang
Journal:  Angew Chem Int Ed Engl       Date:  2010-12-29       Impact factor: 15.336

5.  Conjugate addition-initiated Nazarov cyclization.

Authors:  Joshua L Brooks; Patrick A Caruana; Alison J Frontier
Journal:  J Am Chem Soc       Date:  2011-07-22       Impact factor: 15.419

6.  Pt(II)-catalyzed synthesis of 1,2-dihydropyridines from aziridinyl propargylic esters.

Authors:  Massoud Motamed; Eric M Bunnelle; Surendra W Singaram; Richmond Sarpong
Journal:  Org Lett       Date:  2007-04-24       Impact factor: 6.005

7.  Mechanistically diverse copper-, silver-, and gold-catalyzed acyloxy and phosphatyloxy migrations: efficient synthesis of heterocycles via cascade migration/cycloisomerization approach.

Authors:  Todd Schwier; Anna W Sromek; Dahrika M L Yap; Dmitri Chernyak; Vladimir Gevorgyan
Journal:  J Am Chem Soc       Date:  2007-07-21       Impact factor: 15.419

8.  Beyond the Divinyl Ketone: Innovations in the Generation and Nazarov Cyclization of Pentadienyl Cation Intermediates.

Authors:  William T Spencer; Tulaza Vaidya; Alison J Frontier
Journal:  European J Org Chem       Date:  2013-06-01

9.  No acid required: 4π and 6π electrocyclization reactions of dienyl diketones for the synthesis of cyclopentenones and 2H-Pyrans.

Authors:  Steven D Jacob; Joshua L Brooks; Alison J Frontier
Journal:  J Org Chem       Date:  2014-10-17       Impact factor: 4.354

10.  Palladium-Catalyzed Oxidative Synthesis of α-Acetoxylated Enones from Alkynes.

Authors:  Tuo Jiang; Xu Quan; Can Zhu; Pher G Andersson; Jan-E Bäckvall
Journal:  Angew Chem Int Ed Engl       Date:  2016-04-06       Impact factor: 15.336
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