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Brenek SJ, Caron S, Chisowa E, Delude MP, Drexler MT, Ewing MD, Handfield RE, Ide ND, Nadkarni DV, Nelson JD, Olivier M, Perfect HH, Phillips JE, Teixeira JJ, Weekly RM, Zelina JP. Development of a Practical and Convergent Process for the Preparation of Sulopenem. Org Process Res Dev 2012. [DOI: 10.1021/op300131e] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Steven J. Brenek
- Chemical
Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern
Point Road, Groton, Connecticut 06340, United States
| | - Stéphane Caron
- Chemical
Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern
Point Road, Groton, Connecticut 06340, United States
| | - Esmort Chisowa
- Chemical
Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern
Point Road, Groton, Connecticut 06340, United States
| | - Mark P. Delude
- Chemical
Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern
Point Road, Groton, Connecticut 06340, United States
| | - Michele T. Drexler
- Chemical
Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern
Point Road, Groton, Connecticut 06340, United States
| | - Marcus D. Ewing
- Chemical
Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern
Point Road, Groton, Connecticut 06340, United States
| | - Robert E. Handfield
- Chemical
Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern
Point Road, Groton, Connecticut 06340, United States
| | - Nathan D. Ide
- Chemical
Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern
Point Road, Groton, Connecticut 06340, United States
| | - Durgesh V. Nadkarni
- Chemical
Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern
Point Road, Groton, Connecticut 06340, United States
| | - Jade D. Nelson
- Chemical
Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern
Point Road, Groton, Connecticut 06340, United States
| | - Mark Olivier
- Chemical
Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern
Point Road, Groton, Connecticut 06340, United States
| | - Hahdi H. Perfect
- Chemical
Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern
Point Road, Groton, Connecticut 06340, United States
| | - James E. Phillips
- Chemical
Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern
Point Road, Groton, Connecticut 06340, United States
| | - John J. Teixeira
- Chemical
Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern
Point Road, Groton, Connecticut 06340, United States
| | - R. Matt Weekly
- Chemical
Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern
Point Road, Groton, Connecticut 06340, United States
| | - John P. Zelina
- Chemical
Research and Development, ‡Analytical Research and Development, Pfizer Worldwide Research and Development, Eastern
Point Road, Groton, Connecticut 06340, United States
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Brenek SJ, Caron S, Chisowa E, Colon-Cruz R, Delude MP, Drexler MT, Handfield RE, Jones BP, Nadkarni DV, Nelson JD, Olivier M, Weekly RM, Bellinger GCA, Brkic Z, Choi N, Desneves J, Lee MAP, Pearce W, Watson JK. Development of a Second-Generation Process to Antibacterial Candidate Sulopenem. Org Process Res Dev 2012. [DOI: 10.1021/op300130p] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | - G. C. A. Bellinger
- IDT Australia Limited, 45 Wadhurst Drive,
Boronia, Victoria 3155, Australia
| | - Zinka Brkic
- IDT Australia Limited, 45 Wadhurst Drive,
Boronia, Victoria 3155, Australia
| | - Neil Choi
- IDT Australia Limited, 45 Wadhurst Drive,
Boronia, Victoria 3155, Australia
| | - Joe Desneves
- IDT Australia Limited, 45 Wadhurst Drive,
Boronia, Victoria 3155, Australia
| | - Marcia A.-P. Lee
- IDT Australia Limited, 45 Wadhurst Drive,
Boronia, Victoria 3155, Australia
| | - Wayne Pearce
- IDT Australia Limited, 45 Wadhurst Drive,
Boronia, Victoria 3155, Australia
| | - Jessica K. Watson
- IDT Australia Limited, 45 Wadhurst Drive,
Boronia, Victoria 3155, Australia
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4
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Sanchez S, Bateson JH, O'Hanlon PJ, Gallagher T. S-Alkyl Dithioformates as 1,3-Dipolarophiles. Generation of C(2)-Unsubstituted Penems. Org Lett 2004; 6:2781-3. [PMID: 15281768 DOI: 10.1021/ol048991z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
S-Alkyl dithioformates, generated by a cycloreversion process, react as 1,3-dipolarophiles with beta-lactam-based azomethine ylids to provide, after (net) elimination of MeSH, C(2)-unsubstituted penems. The overall cycloreversion/cycloaddition sequence was accelerated by microwave irradiation. [reaction: see text]
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Affiliation(s)
- Sylvie Sanchez
- School of Chemistry, University of Bristol, Bristol BS8 1TS, UK
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9
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Alcaide B, Polanco C, Sierra MA. Alkyne-Co(2)(CO)(6) Complexes in the Synthesis of Fused Tricyclic beta-Lactam and Azetidine Systems(,)(1). J Org Chem 1998; 63:6786-6796. [PMID: 11672296 DOI: 10.1021/jo980114h] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A synthetic approach to racemic and enantiomerically pure, fused tricyclic 2-azetidinones and azetidines has been developed by using a Pauson-Khand (P-K) reaction on monocyclic enyne-beta-lactams as the key synthetic step. The access to cyclization precursors, monocyclic beta-lactams 1-7, was achieved by Staüdinger reaction of enyne imines 8 and 9 and D-glyceraldehyde imines 10 and (benzyloxy)- or phenoxyacetyl chlorides. Enyne imines 8 and 9 formed cis-2-azetidinones 1 and 2 having the required enyne moiety. cis-2-Azetidinones 11 were obtained as single diastereomers and transformed to enyne-2-azetidinones 3 and 5 by standard methodology. Alternatively, 4-formyl-2-azetidinones 14 were prepared by cyclization of p-anisyl glyoxal diimine and (benzyloxy)acetyl chloride and converted to racemic enyne-beta-lactams 4 and 6 by standard reactions. Enyne-2-azetidinones 1-7 were reacted with Co(2)(CO)(8) to quantitatively yield the corresponding alkyne-Co(2)(CO)(6) complexes. Reaction of such complexes with different promoters, especially heat and TMANO, formed tricyclic 2-azetidinones 15-19 with the ring system fused to the C3-C4 and C4-N1 lactam bonds. Yields were usually high, and the processes were highly diastereoselective. The exceptions were enyne-2-azetidinones 2 and 3a bearing N-propargyl moieties. These products decomposed to mixtures of unidentifiable products. Inhibition of the amide resonance was postulated as responsible for the failure of beta-lactams 2 and 3a to form tricyclic systems. In fact, the analogous enyne-azetidines 20a,b smoothly cyclized to form the corresponding tricyclic systems. This approach to tricyclic azetidines was extended to prepare different products. A new, unprecedented, N1-C2 bond breakage was also observed in the azetidine ring. The results described show that the P-K reaction is a suitable approach to tricyclic 2-azetidinones and azetidines. These are the first examples reported for a P-K reaction in with the enyne system is tethered to a strained heterocyclic four-membered ring.
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Affiliation(s)
- Benito Alcaide
- Departamento de Química Orgánica I, Facultad de Química, Universidad Complutense, 28040-Madrid, Spain
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