Literature DB >> 16089451

Synthesis of substituted oxa- and aza[3.2.1] and [4.3.1]bicyclics via an unprecedented molybdenum-mediated 1,5-"Michael-type" reaction.

Yongqiang Zhang1, Lanny S Liebeskind.   

Abstract

The direct internal nucleophilic functionalization of a pi-bound carbon of neutral TpMo(CO)2(5-oxo-eta3-pyranyl) and TpMo(CO)2(5-oxo-eta3-pyridinyl) complexes by enolates represents a new reaction profile for neutral TpMo(CO)2(eta3-allyl) complexes. This Mo-mediated "1,5-Michael reaction" proceeds in good to excellent yields and provides, after demetalation, a new and efficient synthetic approach to oxa- and aza[3.2.1]bicyclics of high enantiomeric purity.

Entities:  

Year:  2005        PMID： 16089451     DOI： 10.1021/ja0538132

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


  9 in total

1.  Organometallic enantiomeric scaffolding: a strategy for the enantiocontrolled construction of regio- and stereodivergent trisubstituted piperidines from a common precursor.

Authors:  Heilam Wong; Ethel C Garnier-Amblard; Lanny S Liebeskind
Journal:  J Am Chem Soc       Date:  2011-04-22       Impact factor: 15.419

2.  Novel Substitutions of 1-Alkoxy- and 1-Arylsulfonyloxy-η-Allylmolybdenum Complexes. A Case for η-Alkenyl Carbene Complexes as Intermediates.

Authors:  Thomas C Coombs; Wenwei Huang; Ethel C Garnier-Amblard; Lanny S Liebeskind
Journal:  Organometallics       Date:  2010-11-08       Impact factor: 3.876

3.  Generation and Reactions of ε-Carbonyl Cations via Group 13 Catalysis.

Authors:  Page M Penner; James R Green
Journal:  Molecules       Date:  2022-05-11       Impact factor: 4.927

4.  Organometallic enantiomeric scaffolding. A molybdenum-mediated intramolecular nucleophilic ketalization-demetalation cascade. Total synthesis of (+)-(1R,2S,5S,7R)-2-hydroxy-exo-brevicomin.

Authors:  Bo Cheng; Lanny S Liebeskind
Journal:  Org Lett       Date:  2009-08-20       Impact factor: 6.005

5.  The enantiomeric scaffold approach to highly functionalized 1-oxadecalines: enantio- and regiocontrolled [4 + 2] cycloadditions of 5-alkenyl-eta3-pyranylmolybdenum complexes.

Authors:  Ramón Gómez Arrayás; Jingjun Yin; Lanny S Liebeskind
Journal:  J Am Chem Soc       Date:  2007-02-14       Impact factor: 15.419

6.  Organometallic enantiomeric scaffolding: general access to 2-substituted oxa- and azabicyclo[3.2.1]octenes via a Brønsted acid catalyzed [5 + 2] cycloaddition reaction.

Authors:  Ethel C Garnier; Lanny S Liebeskind
Journal:  J Am Chem Soc       Date:  2008-05-15       Impact factor: 15.419

7.  Practical, scalable, high-throughput approaches to eta3-pyranyl and eta3-pyridinyl organometallic enantiomeric scaffolds using the Achmatowicz reaction.

Authors:  Thomas C Coombs; Maurice D Lee; Heilam Wong; Matthew Armstrong; Bo Cheng; Wenyong Chen; Alessandro F Moretto; Lanny S Liebeskind
Journal:  J Org Chem       Date:  2008-01-03       Impact factor: 4.354

8.  Organometallic enantiomeric scaffolding. Sequential semipinacol/1,5-"Michael-like" reactions as a strategic approach to bridgehead-quaternary center aza[3.3.1]bicyclics: application to the total synthesis of (-)-adaline.

Authors:  Thomas C Coombs; Yongqiang Zhang; Ethel C Garnier-Amblard; Lanny S Liebeskind
Journal:  J Am Chem Soc       Date:  2009-01-28       Impact factor: 15.419

9.  A new reaction motif: "homo-S(N)2'-like" direct nucleophilic addition to neutral eta(3)-allylmolybdenum complexes. total synthesis of the antimalarial (+)-isofebrifugine.

Authors:  Wenyong Chen; Lanny S Liebeskind
Journal:  J Am Chem Soc       Date:  2009-09-09       Impact factor: 15.419
  9 in total

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