Results 61 to 70 of about 913 (183)

New Horizon and Advancements in Synthetic and Biological Applications of Active Methylene Acetonitrile: Mini-Review

Journal of Chemistry
Acetonitrile is generally used as an organic solvent and can also be used as a significant starting material via active methylene acetonitrile in organic synthesis.
Lavanya Nagamalla, Kavitha Kothireddy, Basavarajaiah Suliphuldevara Mathada, Sharanagouda J. Patil, Lavanya Lakshminarayana   +4 more
doaj   +1 more source

Preparation of 3,4,5-Trisubstituted Oxazolones by Pd-Catalyzed Coupling of N‑Alkynyl tert-Butyloxycarbamates with Aryl Halides and Related Electrophiles

, 2016
A novel palladium-catalyzed approach for the assembly of 3,4,5-trisubstituted oxazolones has been achieved by the coupling of N-alkynyl tert-butyloxycarbamates with aryl halides and related electrophiles, which involves an oxidative addition followed by ...
Gangguo Zhu (1508137), Yihui Bai (1508140), Weijian Cui (1819396), Zenghui Lu (1891957), Siyuan Xia (2028907), Fang Luo (277928)   +5 more
core   +3 more sources

The use of 4-hetarylidene- and 4-arylidene-5(4H)-oxazolones as dienophiles. Appropriate reagents to synthesize cyclic analogues of natural amino acids

, 1997
This report describes the behavior of 4-hetaryliden- and 4-aryliden-5(4H)-oxazolones as dienophiles in the Diels-Alder reaction with several dienes.
Peregrina, J.M. [0000-0003-3778-7065], Avenoza, A. [0000-0002-5465-3555], Busto, J.H. [0000-0003-4403-4790], París, M., Cativiela, C.   +4 more
core   +1 more source

Stereoselective, Ruthenium-Photocatalyzed Synthesis of 1,2-Diaminotruxinic Bis-amino Acids from 4Arylidene-5(4H)oxazolones

, 2022
The irradiation of (Z)-2-phenyl-4-aryliden-5­(4H)-oxazolones 1 in deoxygenated CH2Cl2 at 25 °C with blue light (465 nm) in the presence of [Ru­(bpy)3]­(BF4)2 (5% mole ratio) as a triplet photocatalyst promotes the [2+2] photocycloaddition of the CC bonds
Cristian Silvestru, Francisco Boscá, Esteban P. Urriolabeitia, Esteban P. Urriolabeitia (1670488), Enrique Gómez-Bengoa, Maria Luisa Marín (12073059), Cristian Silvestru (1446751), Sonia Sierra (11279256), Ana I. Jiménez (2183236), Francisco Boscá (2178578), Ana I. Jiménez, Alexandra Pop, Alexandra Pop (9926095), M. Victoria Gomez (1505842), M. Victoria Gomez, Maria Luisa Marín, Enrique Gómez-Bengoa (1508548), Germán Sastre, Germán Sastre (1295922), Sonia Sierra   +19 more
core   +1 more source

Synthesis of 5(4H)-oxazolones from cysteine

, 2018
5(4H)-Oksazolona iegūšana no cisteīna. Štrāla S., zinātniskais vadītājs Dr. ķīm., doc. Kļimenkovs I. Kursa darbs organiskajā ķīmijā, 39 lappuses, 10 attēli, 5 tabulas, 32 literatūras avoti, 4 pielikumi. Latviešu valodā.
Štrāla, Signija
core  

A Theoretical (AM1) and Experimental Dipole Moment Study of 5(4H)-Oxazolones

, 1992
Experimental and calculated (AM1) dipole moments have been determined for a series of Z and E-isomers of 4-phenylmethylene-5(4H)-oxazolones (1) and 4(a-phenylethylidene)-5(4H)- oxazolones (2) in order to study the conformation in solution of the phenyl ...
C. Cativiela, J. A. Mayoral, Cativiela, Carlos, M. D. Díaz De Villegas, Fayet, J. P., M. C. Vertut, J. I. García, J. P. Fayet, García, José I., Díaz de Villegas, María D., Vertut, M. C., Mayoral, José A.   +11 more
core   +1 more source

Merocyanines Derived from Oxazolone

, 1970
Merocyanines, derived from different 2-aryl oxazolone as the acidic nuclei and various basic nuclei like 2-methyl 4-phenyl thiazola, 2-methyl benzothiazole, quinoline-2, quinoline-4 and alpha-picoline have been studied with a view to examining the effect of different substituents present at the position-2 of the oxazolone nucleus on the absorption and ...
E. Jena, P. B. Tripathy
openaire   +1 more source

Reactive Intermediates in Peptide Synthesis:  First Crystal Structures and ab Initio Calculations of 2-Alkoxy-5(4H)-oxazolones from Urethane-Protected Amino Acids

, 2016
The structures of the 2-alkoxy-5(4H)-oxazolones derived from 2,2,6,6-tetramethyl-4-[(benzyloxycarbonyl)amino]-1-oxypiperidine-4-carboxylic acid and 2,2,6,6-tetramethyl-4-[(9‘-fluorenylmethoxycarbonyl)amino]-1-oxypiperidine-4-carboxylic acid have been ...
Marco Crisma (1522954), Fernando Formaggio (1760632), Alessandro Bagno (1584787), Giovanni Valle (2976693), Claudio Toniolo (1723621)   +4 more
core   +2 more sources

Synthesis of oxazolones from aminoacids containing hydroxyl groups

, 2018
Oksazolonu iegūšana no hidroksilgrupu saturošām aminoskābēm. Kokars D., zinātniskais vadītājs doc. Igors Kļimenkovs. Bakalaura darbs, 51 lapaspuse, 13 attēli, 1 tabulas, 17 literatūras avoti, 15 pielikumi. Latviešu valodā.
Kokars, Dāvis
core  

Synthesis of New 5-Oxazolones: Their Ring Opening Reactions to Obtain New Benzamide Derivatives

, 2017
New 5-oxazolones have been synthesized via N-protected amino acids which were prepared from various aryl acyl halides and L-amino acids, with DCC. Then, we studied the ring opening reactions of 5-oxazolones with nucleophilic attack by primary aryl amines
Kaya, Kerem, CEVIKKALP, Senem Akkus, GÜNKARA, Ömer Tahir, Ocal, Nuket, GULELI, Muge   +4 more
core   +1 more source