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Synthesis of rare sugar isomers through site-selective epimerization 期刊论文
NATURE, 2020: 403-+
作者:  Jackson, Hartland W.;  Fischer, Jana R.;  Zanotelli, Vito R. T.;  Ali, H. Raza;  Mechera, Robert;  Soysal, Savas D.;  Moch, Holger;  Muenst, Simone;  Varga, Zsuzsanna;  Weber, Walter P.;  Bodenmiller, Bernd
收藏  |  浏览/下载:15/0  |  提交时间:2020/07/03

Glycans have diverse physiological functions, ranging from energy storage and structural integrity to cell signalling and the regulation of intracellular processes(1). Although biomass-derived carbohydrates (such as d-glucose, d-xylose and d-galactose) are extracted on commercial scales, and serve as renewable chemical feedstocks and building blocks(2,3), there are hundreds of distinct monosaccharides that typically cannot be isolated from their natural sources and must instead be prepared through multistep chemical or enzymatic syntheses(4,5). These '  rare'  sugars feature prominently in bioactive natural products and pharmaceuticals, including antiviral, antibacterial, anticancer and cardiac drugs(6,7). Here we report the preparation of rare sugar isomers directly from biomass carbohydrates through site-selective epimerization reactions. Mechanistic studies establish that these reactions proceed under kinetic control, through sequential steps of hydrogen-atom abstraction and hydrogen-atom donation mediated by two distinct catalysts. This synthetic strategy provides concise and potentially extensive access to this valuable class of natural compounds.


Various rare sugars that cannot be isolated from natural sources are synthesized using light-driven epimerization, a process which may find application in other synthetic scenarios.


  
Empowering Latina scientists 期刊论文
SCIENCE, 2019, 363 (6429) : 825-826
作者:  Bernal, Ximena E.;  Rojas, Bibiana;  Pinto-E, Maria Alejandra;  Mendoza-Henao, Angela M.;  Herrera-Montes, Adriana;  Isabel Herrera-Montes, Maria;  Caceres Franco, Andrea del Pilar;  Ceron-Souza, Ivania;  Paz, Andrea;  Vergara, Daniela;  Barragan Contreras, Leidy Alejandra;  Salazar, Camilo;  Bohorquez Alonso, Martha Lucia;  Guarnizo, Carlos E.;  Sanchez, Adriana;  Olaya-Castro, Alexandra;  Urbina-Cardona, Nicolas;  Guayasamin, Juan M.;  Uy, Floria Mora-Kepfer;  Feris, Faride Lamadrid;  Franco-Orozco, Barbara;  Munoz, Martha M.;  Patricia Rincon-Diaz, Martha;  Sanchez Herrera, Melissa;  Betancourth-Cundar, Mileidy;  Tarvin, Rebecca D.;  Marquez, Roberto;  Lopez-Aguirre, Camilo;  Ron, Santiago R.;  Ramirez, Santiago;  Paez-Vacas, Monica;  Gaitan-Espitia, Juan Diego;  Navarrete-Mendez, Maria J.;  Vianna, Juliana A.;  Varela-Jaramillo, Andrea;  Sanchez-Martinez, Paola M.;  Caminer Rodriguez, Marcel Adrian;  Garcia-Robledo, Carlos;  Kuprewicz, Erin K.;  Gomez-Bahamon, Valentina;  Chacon-Vargas, Katherine;  Trillo, Alex;  Ramirez Castaneda, Valeria;  Buenaventura, Eliana;  Carolina Monmany-Garzia, A.;  Carolina Carnaval, Ana;  Dick, Christopher W.;  Jose Andrade-Nunez, Maria;  Carvajal Castro, Juan David;  Marcela Pinto, Diana;  Camargo-Sanabria, Angela A.;  Lips, Karen R.;  Motta-Gonzalez, Diana;  Canedo, Clarissa;  Melissa Diaz, Jhandra;  Navarro-Suarez, Adriana M.;  Corredor, Karen;  Roa-Varon, Adela;  Flechas, Sandra V.;  Andres Martinez-Lanfranco, Juan;  Chiarioni Thome, Maria Tereza;  Caldwell, Michael S.;  Ballestas, Onil;  Mejia M, Carolina;  Chaverri, Gloriana;  Rossi, Alejandra;  Bonaccorso, Elisa;  Pimiento, Catalina;  Guerrero, Rafael F.;  Warkentin, Karen M.;  Montoya-Pachongo, Carolina;  Alvarez, Silvia J.;  Gonzalez-Duran, Gustavo;  Anganoy-Criollo, Marvin;  Martinez-Habibe, Maria Cristina;  Ramirez, Juan P.;  Burrowes, Patricia;  Catenazzi, Alessandro;  Riveros, Andre J.;  Targino, Mariane;  Velez, Alejandro;  Vargas, Oscar M.;  Zapata, Felipe;  Waltrick, Camilla Spengler;  Ceron, Karoline;  Segovia Salcedo, Claudia;  Silva-Velasco, Martha;  Ochoa-Herrera, Valeria;  Medina, Iliana;  Narins, Peter M.;  Alves Saccol, Suelen da Silva;  de Castro Godinho, Marcela Brasil;  Velasquez Escobar, Beatriz Eugenia;  Velasco, Julian A.;  Lomascolo, Silvia;  Hoke, Kim;  Zeidemann, Vivian;  Almeida-Santos, Patricia;  Paola Ferraro, Daiana;  Araujo-Vieira, Katyuscia;  da Rocha, Sabine Borges;  Torres, Maria Fernanda;  Daniel Cadena, Carlos;  Collevatti, Rosane Garcia;  Vasconcellos, Mariana Mira;  Recart, Wilnelia;  Mitchell Aide, T.;  Bacon, Christine;  Jeckel, Adriana Moriguchi;  Diele-Viegas, Luisa Maria;  Calijorne Lourenco, Ana Carolina;  Santos, Danusy Lopes;  Rieder Cholak, Luiza;  Mendes, Roberta Graboski;  Silva, Fernanda Magalhaes;  Guedes, Thais;  Lopez-Perilla, Yeny R.;  Fusinatto, Luciana Ardenghi;  Terra, Juliana de Souza;  Rodriguez Brenes, Sofia;  Narvaez, Andrea E.;  Zina, Juliana;  Calderon-Espinosa, Martha L.;  Pardo-Diaz, Carolina;  Abadie, Michelle;  Maldonado-Chaparro, Adriana;  Cespedes Arias, Laura N.;  Montesinos, Rachel;  Fenker, Jessica;  Brunes, Tuliana Oliveira;  Ferreira Lantyer Silva, Amanda Santiago;  Vallejos, Johana Goyes;  Costa Rodrigues, Ana Paula V.;  Friol, Natalia Rizzo;  Herrera-Alvarez, Santiago;  de Souza, Eletra;  Araujo, Olivia G. S.;  Citeli, Nathalie Q. K.;  Ruggeri, Joice;  Fierro-Calderon, Eliana;  Acevedo-Charry, Orlando;  Barato, Paola;  Campos-Cerqueira, Marconi;  Mazzini, Flavia;  Beltran, Ivan;  Alejandra Meneses-Giorgi, Maria;  Jerez, Adriana;  Clavijo, Andrea P.;  Neira Jimenez, Carolina;  Dantas, Gisele P. M.;  Nascimento, Luciana Barreto;  Caballero, Susana J.;  Henao Sepulveda, A. Carolina;  Wolff, Marta;  Barnabe, Paula Cristina;  Quinones-Lebron, Shakira G.;  Bressan, Raissa Fries;  Gomez-Montoya, Nataly;  Gomez, Camila;  Colon-Pineiro, Zuania;  Esquivel Dobles, Carolina;  Bloch, Natasha;  Stynoski, Jennifer L.;  Arango, Daniel;  Marisol Gonzalez, Tania;  Luque Moreno, Francisco;  Taylor, Ryan;  Lawrence, J. P.;  Briscoe, Adriana Darielle Mejia;  Ortiz-Barrientos, Daniel;  Elena Salerno, Patricia;  Restrepo, Silvia;  Pasukonis, Andrius;  Damasceno, Roberta Pacheco;  Cecilia Dalton, Maria;  Proehl, Heike;  Valdez-Ward, Evelyn;  Andrea Rodriguez, Sabrina;  Marquez Garcia, Marcela;  Bianca Bonaparte, Eugenia;  Molina Escobar, Jorge Alberto;  Brown, Jason L.;  Yeager, Justin;  Kikuchi, David;  Ringler, Max;  Duran, Linda Hernandez;  Schulte, Lisa M.;  Vaira, Marcos;  Pereyra, Laura;  Astudillo Bravo, Diana;  Jose Salica, Maria;  Varga, Sandra;  Eguren, Antonieta;  Grattarola, Florencia;  Bernal, Moises A.;  Soledad Gaston, Maria;  Ortega Chinchilla, Jesus Eduardo;  Burdfield-Steel, Emily;  Valencia, Lina M.;  Ringler, Eva;  Rada, Marco;  Melendez-Ackerman, Elvia;  Botero, Carlos A.;  Estrada-Villegas, Sergio;  Orizaola, German;  Pinto, Brendan J.;  Gonzalez-Bellido, Paloma;  Hunter, Kimberly L.;  Rueda Solano, Luis Alberto;  Gordon, Swanne;  Guerra, Monica A.;  Jose Albo, Maria;  Vega-Frutis, Rocio;  Blundo, Cecilia;  Castaneda-Gomez, Laura;  Donnelly, Maureen A.;  Escobar, Betsabe D. Castro;  Isabel Moreno, Maria;  Crawford, Andrew J.;  Jiggins, Chris D.;  Roessler, Daniela C.;  Bravo Valencia, Laura;  Sarmiento, Carolina;  Munoz, Karen A.;  Galeano, Sandra P.;  del Rosario Castaneda, Maria;  Caro Cardenas, Cindy Jeanet;  Zalamea, Paul-Camilo;  Arias, Monica;  Zank, Caroline;  Suarez-Mayorga, Angela M.;  Colombo, Patrick;  Cuervo, Andres M.;  Coriolano, Iara Reinaldo;  de Melo, Lilian Sayuri Ouchi;  Buitrago Cardona, Alexandra;  Elias, Marianne;  Gonzalez, Mabel;  Maria Aldana, Ana;  Gubert, Carolina;  Luis Parra, Juan;  Contador, Tamara;  Coelho, Lorena;  Trillo, Mariana;  Bordin, Kauane;  Zulian, Viviane;  Moreno Arias, Rafael;  Loretto, Matthias-Claudio;  Alejandra Medina, Claudia;  Lyra, Mariana L.;  Pulido-Santacruz, Paola;  Rosser, Neil;  Waldron, Talia;  Moreno Duran, Carmen Helena;  Pizano, Camila;  Hoedl, Walter;  Fratani, Jessica;  Duport Bru, Ana Sofia;  Grosso, Jimena;  Vera Candioti, Florencia;  Adarve Rengifo, Isabel
收藏  |  浏览/下载:24/0  |  提交时间:2019/11/27
New NSF policy will stifle innovation 期刊论文
SCIENCE, 2018, 362 (6412) : 297-298
作者:  Alberts, Susan;  Anderson, Rindy;  Ballen, Cissy J.;  Barrick, Jeffrey E.;  Bordenstein, Seth;  Boyd, Sunny K.;  Bracken-Grissom, Heather;  Braun, Christopher B.;  Coppola, David M.;  Cox, Daniel N.;  Crandall, Keith A.;  Cronin, Thomas W.;  Demas, Gregory E.;  Derby, Charles D.;  Edwards, Scott V.;  Eisthen, Heather L.;  Foster, James A.;  Gilbert, Cole;  Halanych, Kenneth M.;  Herculano-Houzel, Suzana;  Hoekstra, Hopi;  Hof, Patrick R.;  Hoke, Kim L.;  Holekamp, Kay E.;  Jarvis, Erich;  Johnsen, Sonke;  Katz, Paul S.;  Kay, Leslie M.;  Kehoe, David M.;  Kelley, Darcy B.;  Kerr, Benjamin;  Ketterson, Ellen;  Kier, William M.;  Koehl, Mimi A. R.;  Last, Robert L.;  Lazazzera, Beth;  Lenski, Richard E.;  Losos, Jonathan B.;  Lutterschmidt, Deborah I.;  Lynch, Michael;  Mahon, Andrew R.;  Martindale, Mark Q.;  Martins, Emilia P.;  McClintock, James B.;  Mesce, Karen A.;  Mukhopadhyay, Suchetana;  Oakley, Todd H.;  Phelps, Steven M.;  Phillips, Richard P.;  Queller, David;  Renn, Suzy C. P.;  Rosvall, Kimberly;  Schweizer, Felix E.;  Shubin, Neil;  Silk, Joan;  Strassmann, Joan E.;  Strausfeld, Nicholas J.;  Strauss, Sharon Y.;  Striedter, Georg;  Swalla, Billie J.;  Tarrant, Ann;  Throop, Heather L.;  Turner, Paul E.;  Voss, S. Randal;  Wake, Marvalee H.;  Wares, John P.;  Webster, Mike;  White, Stephanie A.;  Wilczynski, Walter;  Wray, Greg A.;  Wright, Timothy F.
收藏  |  浏览/下载:21/0  |  提交时间:2019/11/27
Continental-scale decrease in net primary productivity in streams due to climate warming 期刊论文
NATURE GEOSCIENCE, 2018, 11 (6) : 415-+
作者:  Song, Chao;  Dodds, Walter K.;  Ruegg, Janine;  Argerich, Alba;  Baker, Christina L.;  Bowden, William B.;  Douglas, Michael M.;  Farrell, Kaitlin J.;  Flinn, Michael B.;  Garcia, Erica A.;  Helton, Ashley M.;  Harms, Tamara K.;  Jia, Shufang;  Jones, Jeremy B.;  Koenig, Lauren E.;  Kominoski, John S.;  McDowell, William H.;  McMaster, Damien;  Parker, Samuel P.;  Rosemond, Amy D.;  Ruffing, Claire M.;  Sheehan, Ken R.;  Trentman, Matt T.;  Whiles, Matt R.;  Wollheim, Wilfred M.;  Ballantyne, Ford
收藏  |  浏览/下载:8/0  |  提交时间:2019/04/09
Petrophysical and mineralogical evolution of weathered crystalline basement in western Uganda: Implications for fluid transfer and storage 期刊论文
AAPG BULLETIN, 2018, 102 (6) : 1035-1065
作者:  Walter, B.;  Geraud, Y.;  Bartier, D.;  Kluska, J-M;  Diraison, M.;  Morlot, C.;  Raisson, F.
收藏  |  浏览/下载:1/0  |  提交时间:2019/04/09
Challenging local realism with human choices 期刊论文
NATURE, 2018, 557 (7704) : 212-+
作者:  Abellan, C.;  Acin, A.;  Alarcon, A.;  Alibart, O.;  Andersen, C. K.;  Andreoli, F.;  Beckert, A.;  Beduini, F. A.;  Bendersky, A.;  Bentivegna, M.;  Bierhorst, P.;  Burchardt, D.;  Cabello, A.;  Carine, J.;  Carrasco, S.;  Carvacho, G.;  Cavalcanti, D.;  Chaves, R.;  Cortes-Vega, J.;  Cuevas, A.;  Delgado, A.;  de Riedmatten, H.;  Eichler, C.;  Farrera, P.;  Fuenzalida, J.;  Garcia-Matos, M.;  Garthoff, R.;  Gasparinetti, S.;  Gerrits, T.;  Jouneghani, F. Ghafari;  Glancy, S.;  Gomez, E. S.;  Gonzalez, P.;  Guan, J-Y;  Handsteiner, J.;  Heinsoo, J.;  Heinze, G.;  Hirschmann, A.;  Jimenez, O.;  Kaiser, F.;  Knill, E.;  Knoll, L. T.;  Krinner, S.;  Kurpiers, P.;  Larotonda, M. A.;  Larsson, J-A;  Lenhard, A.;  Li, H.;  Li, M-H;  Lima, G.;  Liu, B.;  Liu, Y.;  Lopez Grande, I. H.;  Lunghi, T.;  Ma, X.;  Magana-Loaiza, O. S.;  Magnard, P.;  Magnoni, A.;  Marti-Prieto, M.;  Martinez, D.;  Mataloni, P.;  Mattar, A.;  Mazzera, M.;  Mirin, R. P.;  Mitchell, M. W.;  Nam, S.;  Oppliger, M.;  Pan, J-W;  Patel, R. B.;  Pryde, G. J.;  Rauch, D.;  Redeker, K.;  Rielander, D.;  Ringbauer, M.;  Roberson, T.;  Rosenfeld, W.;  Salathe, Y.;  Santodonato, L.;  Sauder, G.;  Scheidl, T.;  Schmiegelow, C. T.;  Sciarrino, F.;  Seri, A.;  Shalm, L. K.;  Shi, S-C;  Slussarenko, S.;  Stevens, M. J.;  Tanzilli, S.;  Toledo, F.;  Tura, J.;  Ursin, R.;  Vergyris, P.;  Verma, V. B.;  Walter, T.;  Wallraff, A.;  Wang, Z.;  Weinfurter, H.;  Weston, M. M.;  White, A. G.;  Wu, C.;  Xavier, G. B.;  You, L.;  Yuan, X.;  Zeilinger, A.;  Zhang, Q.;  Zhang, W.;  Zhong, J.
收藏  |  浏览/下载:13/0  |  提交时间:2019/11/27
Increasing potential for intense tropical and subtropical thunderstorms under global warming 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2017, 114 (44) : 11657-11662
作者:  Singh, Martin S.;  Kuang, Zhiming;  Maloney, Eric D.;  Hannah, Walter M.;  Wolding, Brandon O.
收藏  |  浏览/下载:6/0  |  提交时间:2019/11/27
severe weather  intense thunderstorms  CAPE  climate change  tropical atmosphere  
Size-resolved aerosol and cloud condensation nuclei (CCN) properties in the remote marine South China Sea - Part 1: Observations and source classification 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2017, 17 (2)
作者:  Atwood, Samuel A.;  Reid, Jeffrey S.;  Kreidenweis, Sonia M.;  Blake, Donald R.;  Jonsson, Haflidi H.;  Lagrosas, Nofel D.;  Xian, Peng;  Reid, Elizabeth A.;  Sessions, Walter R.;  Simpas, James B.
收藏  |  浏览/下载:7/0  |  提交时间:2019/04/09
Potential effects of sea-level rise on the depth to saturated sediments of the Sagamore and Monomoy flow lenses on Cape Cod, Massachusetts 科技报告
来源:US Geological Survey (USGS). 出版年: 2016
作者:  Walter, Donald A. dawalter@usgs.gov;  McCobb, Timothy D. tmccobb@usgs.gov;  Masterson, John P. jpmaster@usgs.gov;  Fienen, Michael N. mnfienen@usgs.gov
收藏  |  浏览/下载:9/0  |  提交时间:2019/04/05