Literature DB >> 15701010

Rearrangements and stereomutations of metallacycles derived from allenes and imidozirconium complexes.

Forrest E Michael1, Andrew P Duncan, Zachary K Sweeney, Robert G Bergman.   

Abstract

The mechanisms of the rearrangements and stereoinversion of azametallacyclobutenes generated via [2+2] cycloaddition of allenes and imidozirconium complexes have been studied. Metallacycles derived from allenes bearing beta-hydrogen atoms racemize at room temperature by reversible beta-hydride elimination, a process which is also responsible for their eventual conversion to monoazadiene complexes. Metallacycles derived from diarylallenes racemize by reversible thermal bond homolysis at 95 degrees C; racemization of these metallacycles is also catalyzed by mild oxidants.

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Year:  2005        PMID： 15701010      PMCID： PMC1444910          DOI： 10.1021/ja045607k

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


  23 in total

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5.  Solvent Cage Effects in Organocobalt Corrinoid Chemistry: Thermal Homolysis of alpha- and beta-(Cyanomethyl)cobinamides(1).

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Journal:  Bioinformatics       Date:  1998       Impact factor: 6.937

7.  Use of group 4 bis(sulfonamido) complexes in the intramolecular hydroamination of alkynes and allenes.

Authors:  Lutz Ackermann; Robert G Bergman; Rebecca N Loy
Journal:  J Am Chem Soc       Date:  2003-10-01       Impact factor: 15.419

8.  Titanium hydrazido and imido complexes: synthesis, structure, reactivity, and relevance to alkyne hydroamination.

Authors:  Yahong Li; Yanhui Shi; Aaron L Odom
Journal:  J Am Chem Soc       Date:  2004-02-18       Impact factor: 15.419

9.  C-H bond activation of hydrocarbons by an imidozirconocene complex.

Authors:  Helen M Hoyt; Forrest E Michael; Robert G Bergman
Journal:  J Am Chem Soc       Date:  2004-02-04       Impact factor: 15.419

10.  Anti-Markovnikov intermolecular hydroamination: a bis(amidate) titanium precatalyst for the preparation of reactive aldimines.

Authors:  Zhe Zhang; Laurel L Schafer
Journal:  Org Lett       Date:  2003-11-27       Impact factor: 6.005
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  2 in total

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Authors:  Mohammad Movassaghi; Omar K Ahmad
Journal:  J Org Chem       Date:  2007-02-03       Impact factor: 4.354

2.  Neutral and Cationic Alkyl Tantalum Imido Complexes: Synthesis and Migratory Insertion Reactions.

Authors:  Laura L Anderson; Joseph A R Schmidt; John Arnold; Robert G Bergman
Journal:  Organometallics       Date:  2006-07-03       Impact factor: 3.876
  2 in total

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