A General Model for Selectivity in Olefin Cross Metathesis.
نویسندگان
چکیده
منابع مشابه
A general model for selectivity in olefin cross metathesis.
In recent years, olefin cross metathesis (CM) has emerged as a powerful and convenient synthetic technique in organic chemistry; however, as a general synthetic method, CM has been limited by the lack of predictability in product selectivity and stereoselectivity. Investigations into olefin cross metathesis with several classes of olefins, including substituted and functionalized styrenes, seco...
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[reaction: see text] A template containing two secondary dialkylammonium ion recognition sites for encirclement by olefin-bearing dibenzo[24]crown-8 derivatives has been used to promote olefin cross metatheses with ruthenium-alkylidene catalysts. For monoolefin monomers, the rates of metatheses and yields of the dimers are both amplified in the presence of the template. Likewise, for a diolefin...
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The first successful example of olefin cross-metathesis with chloroalkenes is reported.
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The first kinetically controlled, highly trans-selective (>98%) olefin cross-metathesis reaction is demonstrated using Ru-based catalysts. Reactions with either trans or cis olefins afford products with highly trans or cis stereochemistry, respectively. This E-selective olefin cross-metathesis is shown to occur between two trans olefins and between a trans olefin and a terminal olefin. Addition...
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metathesis of proteins under aqueous conditions, which makes a powerful reaction in organic and polymer chemistry potentially available for the elaboration of biopolymers. The work by Davis and colleagues raises two follow-up questions regarding the versatility of the metathesis approach and its implementation under physiological conditions. The present study tests metathesis of proteins on a r...
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ژورنال
عنوان ژورنال: ChemInform
سال: 2004
ISSN: 0931-7597,1522-2667
DOI: 10.1002/chin.200402058