Mechanistic Insight into the Facilitation of β-Lactam Fragmentation through Metal Assistance

Luis Casarrubios; Miguel A. Esteruelas; Carmen Larramona; Agustí Lledõs; Jaime G. Muntaner; Enrique Oñate; Manuel A. Ortuño; Miguel A. Sierra

doi:10.1002/chem.201503595

Mechanistic Insight into the Facilitation of β-Lactam Fragmentation through Metal Assistance

Luis Casarrubios, Miguel A. Esteruelas, Carmen Larramona, Agustí Lledõs, Jaime G. Muntaner, Enrique Oñate, Manuel A. Ortuño, Miguel A. Sierra

Chemistry (Twin Cities)

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

The mechanism of OsH₆(PiPr₃)₂-mediated fragmentation of a 4-(2 pyridyl)-2-azetidinone has been investigated by DFT calculations. The addition of the C4-H bond of the substrate to OsH₂(PiPr₃)₂ allows the active participation of an osmium lone pair in the B-type β-lactam fragmentation process. This new mechanism makes the N1-C4/C2-C3 fragmentation of the lactamic core thermally accessible through a stepwise process.

Original language	English (US)
Pages (from-to)	16781-16785
Number of pages	5
Journal	Chemistry - A European Journal
Volume	21
Issue number	47
DOIs	https://doi.org/10.1002/chem.201503595
State	Published - Nov 1 2015

Bibliographical note

Publisher Copyright:
© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords

azetidinone
density functional calculations
hexahydride
osmium
β-lactam fragmentation

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title = "Mechanistic Insight into the Facilitation of β-Lactam Fragmentation through Metal Assistance",

abstract = "The mechanism of OsH6(PiPr3)2-mediated fragmentation of a 4-(2 pyridyl)-2-azetidinone has been investigated by DFT calculations. The addition of the C4-H bond of the substrate to OsH2(PiPr3)2 allows the active participation of an osmium lone pair in the B-type β-lactam fragmentation process. This new mechanism makes the N1-C4/C2-C3 fragmentation of the lactamic core thermally accessible through a stepwise process.",

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AU - Casarrubios, Luis

AU - Esteruelas, Miguel A.

AU - Larramona, Carmen

AU - Lledõs, Agustí

AU - Muntaner, Jaime G.

AU - Oñate, Enrique

AU - Ortuño, Manuel A.

AU - Sierra, Miguel A.

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AB - The mechanism of OsH6(PiPr3)2-mediated fragmentation of a 4-(2 pyridyl)-2-azetidinone has been investigated by DFT calculations. The addition of the C4-H bond of the substrate to OsH2(PiPr3)2 allows the active participation of an osmium lone pair in the B-type β-lactam fragmentation process. This new mechanism makes the N1-C4/C2-C3 fragmentation of the lactamic core thermally accessible through a stepwise process.

KW - azetidinone

KW - density functional calculations

KW - hexahydride

KW - osmium

KW - β-lactam fragmentation

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Mechanistic Insight into the Facilitation of β-Lactam Fragmentation through Metal Assistance

Abstract

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Keywords

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