Highly diastereoselective and enantioselective olefin cyclopropanation using engineered myoglobin-based catalysts.

Highly diastereoselective and enantioselective olefin cyclopropanation using engineered myoglobin-based catalysts.
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DOI:
10.1002/anie.201409928
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发表时间:
2015-02-02
影响因子:
16.6
通讯作者:
Fasan, Rudi
Fasan, Rudi
中科院分区:
化学1区
文献类型:
--
作者:
Bordeaux, Melanie;Tyagi, Vikas;Fasan, Rudi

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Using rational design, an engineered myoglobin-based catalyst capable of catalyzing the cyclopropanation of aryl-substituted olefins with catalytic proficiency (up to 46,800 turnovers) and excellent diastereo- and enantioselectivity (98–99.9%) was developed. This transformation could be carried out in the presence of up to 20 g / L−1 olefin substrate with no loss in diastereo- and/or enantioselectivity. Mutagenesis and mechanistic studies support a cyclopropanation mechanism mediated by an electrophilic, heme-bound carbene species and a model is provided to rationalize the stereopreference of the protein catalyst. This work shows that myoglobin constitutes a promising and robust scaffold for the development of biocatalysts with carbene transfer reactivity.
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