Results 81 to 90 of about 9,421 (215)

Total Synthesis of Bacterial 5-(3-Indolyl)oxazole Alkaloids: Pimprinols A–C

SynOpen, 2019
Pimprinols A, B, and C are bacterial 5-(3-indolyl)oxazole alkaloids that have been isolated from Streptomyces sp. Lv3–13. In this paper, we report a new synthesis of pimprinol A and the first total synthesis of pimprinol B and pimprinol C.
Tímea Szabó, Róbert Kormány, András Dancsó, Balázs Volk, Mátyás Milen   +4 more
doaj   +1 more source

Intermolecular One‐Pot Cyclization of Formyl‐Pyrroles of Amino Acid Esters with Norephedrine: Stereoselective Routes to New Tricyclic Pyrrole—Pyrazine—Oxazole Fused Structures.

, 2006
The treatment of esters of amino acids with dimethoxytetrahydrofuran furnished pyrrole derivatives of amino acid esters. The Wilsmeier-Haack formylation followed by the reaction of the formylated pyrroles with norephedrine afforded a selective formation ...
N. Tuna Subasi, Demir, Ayhan S., Subasi, N. Tuna, Ayhan S. Demir, Ertan Sahin, Demir, Ayhan Sıtkı, Sahin, Ertan   +6 more
core   +1 more source

Oxazole light triggered protecting groups: synthesis and photolysis of fused heteroaromatic conjugates [PDF]

, 2010
Fused oxazole derivatives were synthesized and evaluated as new light triggered protecting groups by using amino acids as model bifunctional molecules. The photosensitivity of ester conjugates was tested under irradiation at 254, 300, and 350 nm. Oxazole
Ana M.S. Soares, Gonçalves, M. Sameiro T., M. Sameiro T. Gonçalves, Costa, Susana P. G., Susana P.G. Costa, Soares, Ana M. S.   +5 more
core   +1 more source

BENZO[d]OXAZOLE DERIVATIVES FUNCTIONALIZED WITH REACTIVE GROUPS

Studia Universitatis Babes-Bolyai Chemia
A series of compounds having a benzoxazole moiety in their structure have been synthesized starting from 6-hydroxy-2-methylbenzo[d]oxazole, whose preparation through the Beckmann rearrangement of resacetophenone oxime is described.
Gheorghe ROMAN, Mihaela BALAN-PORCĂRAŞU   +1 more
doaj   +1 more source

Crystal structure and Hirshfeld surface analysis of 5-[(5-nitro-1H-indazol-1-yl)methyl]-3-phenyl-4,5-dihydroisoxazole

Acta Crystallographica Section E: Crystallographic Communications, 2019
In the title compound, C17H14N4O3, the indazole unit is planar to within 0.0171 (10) Å and makes dihedral angles of 6.50 (6) and 6.79 (4)°, respectively, with the nitro and pendant phenyl groups.
Mohammed Boulhaoua, Sevgi Kansiz, Mohamed El Hafi, Sanae Lahmidi, Necmi Dege, Mohammed Benchidmi, Joel T. Mague   +6 more
doaj   +1 more source

Kinetics of Photo-Oxidation of oxazole and its substituents by singlet oxygen [PDF]

, 2020
Oxazole has critical roles not only in heterocycle (bio)chemistry research, but also as the backbone of many active natural and medicinal species. These diverse and specialised functions can be attributed to the unique physicochemical properties of ...
Dlugogorski, B.Z., Zeinali, N., Oluwoye, I., Altarawneh, M.   +3 more
core  

Inhibition of Streptococcus mutans biofilm formation, extracellular polysaccharide production, and virulence by an oxazole derivative

, 2016
Dental caries, a biofilm-related oral disease, is a result of disruption of the microbial ecological balance in the oral environment. Streptococcus mutans, which is one of the primary cariogenic bacteria, produces glucosyltransferases (Gtfs) that ...
Chen, LL, Zou, J, Ren, Z, Zhou, XD, Li, YQ, Zou, J (reprint author), Sichuan Univ, West China Hosp Stomatol, Dept Pediat Dent, Chengdu 610041, Peoples R China., Zeng, JM   +6 more
core   +1 more source

Crystal structure, Hirshfeld surface analysis and interaction energy and DFT studies of 5,5-diphenyl-1,3-bis(prop-2-yn-1-yl)imidazolidine-2,4-dione

Acta Crystallographica Section E: Crystallographic Communications, 2019
The title compound, C21H16N2O2, consists of an imidazolidine unit linked to two phenyl rings and two prop-2-yn-1-yl moieties. The imidazolidine ring is oriented at dihedral angles of 79.10 (5) and 82.61 (5)° with respect to the phenyl rings, while the ...
Ismail Ghandour, Abdelouahed Bouayad, Tuncer Hökelek, Amal Haoudi, Frédéric Capet, Catherine Renard, Youssef Kandri Rodi   +6 more
doaj   +1 more source

Activation of a Terminal Carboxylic Acid by an Internal Oxazole:  A Novel Synthesis of Macrocyclodepsipeptide

, 2016
Activation of a Terminal Carboxylic Acid by an Internal Oxazole:  A Novel Synthesis of ...
Gang Zhao (161405), Xiaowen Sun (172452), Jieping Zhu (1450051), Hugues Bienaymé (2986602)   +3 more
core   +1 more source

A mild high yielding synthesis of oxazole-4-carboxylate derivatives

, 2010
Several 2,5-disubstituted oxazole-4-carboxylates were prepared in high yields from the methyl esters of N-acyl-b-halodehydroaminobutyric acid derivatives by treatment with a 2% solution of DBU in acetonitrile.
Pereira, Goreti, Ferreira, Paula M. T., Monteiro, Luís S., Vilaça, Helena, Castanheira, Elisabete M. S.   +4 more
core   +1 more source