Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Philippe Dagneau"'
Publikováno v:
Angewandte Chemie International Edition. 47:8605-8610
Vannusals A (1a, Figure 1) and B (1b) are two marine natural products notable for their unusual molecular architectures. Isolated from the tropical interstitial ciliate Euplotes vannus strains Si121 and BUN3, these intriguing molecules include in the
Publikováno v:
Angewandte Chemie. 120:8733-8738
Publikováno v:
Angewandte Chemie International Edition. 44:3874-3879
Autor:
Edward J. J. Grabowski, Karen Marcantonio, Amélie Roy, Dalian Zhao, Lushi Tan, Lisa F. Frey, Cheng-yi Chen, Richard D. Tillyer, Philippe Dagneau, Paul D. O’Shea, Xin Wang, Robert A. Reamer, Weirong Chen
Publikováno v:
The Journal of Organic Chemistry. 70:3021-3030
A practical, chromatography-free catalytic asymmetric synthesis of a potent and selective PDE4 inhibitor (L-869,298, 1) is described. Catalytic asymmetric hydrogenation of thiazole ketone 5a afforded the corresponding alcohol 3b in excellent enantios
Autor:
Xin Wang, Joel Robichaud, Peppi Prasit, Cheng-yi Chen, Renata Oballa, Edward J. J. Grabowski, R. D. Tillyer, Philippe Dagneau, Paul D. O’Shea
Publikováno v:
The Journal of Organic Chemistry. 68:2633-2638
A large-scale, chromatography-free synthesis of a potent and selective Cathepsin K inhibitor 1 is reported. The key asymmetric center was installed by addition of (R)-pantolactone to the in situ-generated ketene 4a. The final step of the convergent s
Autor:
Xin Wang, Weirong Chen, Lushi Tan, Paul J. Reider, Lisa F. Frey, Philippe Dagneau, Anthony O. King, Cheng-yi Chen, Richard D. Tillyer, Feng Xu, Edward J. J. Grabowski, Paul D. O’Shea, Dalian Zhao
Publikováno v:
Tetrahedron. 58:7403-7410
Two synthetic strategies to the COX-2 specific inhibitor 1 have been described that allowed its preparation in large quantities in 79% overall yield from (S)-2-hydroxy-2-methylbutyric acid. These studies have led to the identification of an efficient
Autor:
Sarah Stahl, Xin Wang, Richard D. Tillyer, Philippe Dagneau, Paul D. O’Shea, Anthony O. King, Michel Chartrain, Randolph Greasham
Publikováno v:
Biocatalysis and Biotransformation. 18:471-477
The screening of 144 microbial strains yielded several suitable biocatalysts for the asymmetric bioreduction of an allylic ketosulfone to its corresponding (R)-alcohol. The production of the desired enantiomer with elevated optical purity (ee > 90%)
Autor:
Philippe Dagneau, Persephone Canonne
Publikováno v:
Tetrahedron: Asymmetry. 7:2817-2820
Pulegone was used for the first total synthesis of (+)-fulvanin 1 adopting chiron approach. Pertinent methodology includes stereocontrolled Michael-type reaction, functional group adjustements and Wittig olefination.
Autor:
Yao-Jun Shi, Benjamin Marcune, Donald R. Gauthier, Philippe Dagneau, John Y. L. Chung, Shane W. Krska, Mark McLaughlin, Robert A. Reamer, Nobuyoshi Yasuda, Yong-Li Zhong, Richard G. Ball
Publikováno v:
The Journal of organic chemistry. 77(7)
An efficient, new, and scalable semisynthesis of glucan synthase inhibitors 1 and 2 from the fermentation product enfumafungin 3 is described. The highlights of the synthesis include a high-yielding ether bond-forming reaction between a bulky sulfami
Autor:
Philippe Dagneau, Dimitrios E. Lizos, Stellios Arseniyadis, Kyriacos C. Nicolaou, Raffaella Faraoni, Andreas Lanver, Adrian Ortiz, Hongjun Zhang, Michael P. Jennings
Publikováno v:
ChemInform. 41
The total synthesis of the originally assigned structure of vannusal B (2) and its diastereomer (d-2) are described. Initial forays into these structures with model systems revealed the viability of a metathesis-based approach and a SmI2-mediated str