Results 81 to 90 of about 3,131,133 (230)

(1RS,2SR,5SR)-9-Benzyl-2-[(1RS)-1-hydroxybenzyl]-9-azabicyclo[3.3.1]nonan-3-one from synchrotron data

Acta Crystallographica Section E, 2012
In the crystal structure of the racemic title compound, C22H25NO2, solved and refined against sychrotron diffraction data, the hydroxy group and the carbonyl O atom participate in the formation of O—H...O hydrogen bonds between pairs of ...
Karol Wolosewicz, Zbigniew Dauter, Krzysztof Brzezinski, Ryszard Lazny   +3 more
doaj   +1 more source

Mirror symmetry breaking with limited enantioselective autocatalysis and temperature gradients: a stability survey

, 2012
We analyze limited enantioselective (LES) autocatalysis in a temperature gradient and with internal flow/recycling of hot and cold material. Microreversibility forbids broken mirror symmetry for LES in the presence of a temperature gradient alone.
Blanco, Celia, Crusats, Joaquim, El-Hachemi, Zoubir, Hochberg, David, Moyano, Albert, Ribó, Josep M.   +5 more
core   +1 more source

Structural and stereogenic properties of spiro- and ansa-substituted 1,3-propanedioxy derivatives of a spermine-bridged cyclotriphosphazene [PDF]

, 2006
Reaction of 1,3-propanediol with the achiral spermine-bridged cyclophosphazene 1 at various molar ratios in THF gives a number of spiro-and ansa-derivatives that exhibit different stereogenic properties, viz. racemic, meso or achiral forms. As expected,
Adem Kılıç, Alkubaisi, Allen, Beşli, Beşli, Beşli, Brandt, Coles, Coles, Contractor, David B. Davies, Davies, Dez, Fraser, Gönül Yenilmez Çiftçi, Kılıç, Labarre, Labarre, Otwinowski, Pirkle, Porwolik-Czomperlik, Rinaldi, Robert A. Shaw, Robert J. Eaton, Shaw, Sheldrick, Sheldrick, Simon J. Coles, Sullivan, Weissman   +29 more
core   +1 more source

rac-(4R,17S,18R,26R)-Ethyl 4′-methoxycarbonyl-5′′-(4-methoxyphenyl)-1′-methyl-2,3′′-dioxo-2′′,3′′-dihydroindoline-3-spiro-2′-pyrrolidine-3′-spiro-2′′-thiazolo[3,2-a]pyrimidine-6′′-carboxylate

Acta Crystallographica Section E, 2009
In the title compound, C30H30N4O7S, the two spiro junctions link a planar 2-oxindole ring [with a mean deviation from the plane of 0.0319 (3) Å, a pyrrolidine ring in an envelope conformation and a thiazolo[3,2-a]pyrimidine system.
Xiao-Fang Li, Bin-Hong He, Ning-Bo Zhou, Zhao-Hui Hou   +3 more
doaj   +1 more source

SYNTESIS AND CRYSTALLINE STRUCTURE OF THE EXO-3,6-DIMETHYL-3,6-EPOXI-1,2,3,6-TETRAHYDROPHTLALIMIDE AND ITS N-BROMODECYL ANALOG: TWO THERMALLY LABILE DIELS-ALDER ADDUCTS [PDF]

, 2014
Indexación: Web of Science; Scielo.The molecular structure of the exo-3,6-dimethyl-3,6-epoxi-1,2,3,6-tetrahydrophthalimide (1), determined by X-ray diffraction analysis, as well as, its complete spectroscopic characterization and the synthesis and ...
ARAYA-FUENTES, EYLEEN, ESCOBAR, CARLOS A., TRUJILLO, ALEXANDER, VETTERLEIN, CLAUDIA, VÁSQUEZ, RODRIGO   +4 more
core   +2 more sources

Enantioselective Organocatalytic Diels-Alder Trapping of Photochemically Generated Hydroxy-o-Quinodimethanes [PDF]

, 2016
The photoenolization/Diels-Alder strategy offers straightforward access to synthetically valuable benzannulated carbocyclic products. This historical light-triggered process has never before succumbed to efforts to develop an enantioselective catalytic ...
Cuadros, Sara, Dell'Amico, Luca, Melchiorre, Paolo, Vega Pe\uf1aloza, Alberto   +3 more
core   +2 more sources

Molybdenum-catalyzed enantioselective sulfoxidation controlled by a nonclassical hydrogen bond between coordinated chiral imidazolium-based dicarboxylate and peroxido ligands [PDF]

, 2018
Chiral alkyl aryl sulfoxides were obtained by molybdenum-catalyzed oxidation of alkyl aryl sulfides with hydrogen peroxide as oxidant in mild conditions with high yields and moderate enantioselectivities.
Carrasco Carrasco, Carlos Jesús, Galindo del Pozo, Agustín, Montilla Ramos, Francisco Javier   +2 more
core  

Global Antifungal Profile Optimization of Chlorophenyl Derivatives against Botrytis cinerea and Colletotrichum gloeosporioides [PDF]

, 2009
Twenty-two aromatic derivatives bearing a chlorine atom and a different chain in the para or meta position were prepared and evaluated for their in vitro antifungal activity against the phytopathogenic fungi Botrytis cinerea and Colletotrichum ...
Aleu J., Aleu J., Aleu J., Barbosa D., Barbosa de Oliveira D., Burkert U., Bustillo A. J., Bustillo A. J., Bustillo A. J., Clark T., Coleman T. F., Coleman T. F., Coley-Smith J. R., Colmenares A. J., Cruciani G., Cruz-Monteagudo M., Cruz-Monteagudo M., De Boor C., Duke S. O., Echeverri F., Efron B., Eriksson L., Gerald C. F., Gramatica P., Hasegawa K., Hou T. J., Leardi R., Patil I. S., Reino J. L., Saiz-Urra L., Van Waterbeemd H., Yasri A.   +31 more
core   +2 more sources

2-Chloro-1,2-diphenylethanone (desyl chloride)

Acta Crystallographica Section E, 2011
The title compound, C14H11ClO, is a racemic derivative of benzoin. Its carbonyl group adopts a nearly eclipsed conformation with the Cl substituent characterized by a dihedral angle of 17.5 (2)°.
Richard Betz, Cedric McCleland, Eric Hosten   +2 more
doaj   +1 more source

An unbiased approach elucidates variation in (S)-(+)-linalool, a context-specific mediator of a tri-trophic interaction in wild tobacco

, 2019
Plant volatile organic compounds (VOCs) mediate many interactions, and the function of common VOCs is especially likely to depend on ecological context.
Baldwin, I., Fandino, R., Gase, K., Halitschke, R., He, J., Knaden, M., Köllner, T., Luck, K., Murdock, M., Ray, R., Schuman, M.   +10 more
core   +1 more source