Oxazole, 4,5-dihydro-2-methyl-5-phenyl

Bis-[ ( benzo-1,3-oxazol) -yl-(2)-thio]- 343 Bis-[1,4- (bzw. 3,4]-dihydro-naphthy[-(2)-oxy]- 588 Bis-[dimethylamino]- 345 Bis-[4-dimethyIamino-phenyl]- 346 Bis-[4-hydroxy-phenyl]-(2-carboxy-phenyl)- 167 Bis-[4-methoxy-phenyl]-dideutero- 346 Bis-[4-methyl-phenyl]-Bis-f 2-methyl-thiiranyl-(2)]- 570 Bis-[naphthyl-(2)-oxy]- 588 Bis-[naphthyl-(2)-thio]-... [Pg.909]

Oxazol 3-Methyl-4-phenyl-4,5-dihydro- -2-oxid E14b, 917 (En —N02 + S-ylid)... [Pg.742]

Methyl-2-phenyl-4-athoxycarbonyl-l,5-dihydro-l,3-oxazol wird je nach Menge Li-thiumalanat entweder selektiv zum Alkohol reduziert oder man erhalt unter Ringspaltung 2-Benzylamino-3-hydroxy-butandiol-(1,3) (s. S. 347). [Pg.214]

Analog erhalt man aus 5-Oxo-2-phenyl-4,5-dihydro-1,3-oxazol 2-Benzoylamino-athanol5 (88% d.Th.) und mit Lithiumalanat aus 5-Oxo-4-methyl-2-benzyliden-2,5-dihydro-1,3-oxazol 2-Phenylacetylamino-propanol (30% d.Th.)6. Calciumboranat reduziert 5-Oxo-2-phenyl-4-benzyliden-4,5-dihydro-1,3-oxazol zu oc-Benzoylamino-zimtal-kohol1. [Pg.228]

Cyclische 0,N-Acetale vom Typ der 1,3-Oxazolidine und 2,5-Dihydro-l,3-oxazole werden durch Lithiumalanat7 und Natriumboranat8,9 zu 2-Amino-alkoholen reduziert. Aus 3-Methyl-2-phenyl-l,3-oxazolidin wird z.B. mit Natriumboranat 2-(N-Methyl-N-benzyl-amino)-athanol (74% d.Th) erhalten8 ... [Pg.436]

Dimethyl-3-(2-oxo-2-phenyl-ethyl--bromid lagert sich beim Kochen mit Triethylamin in Acetonitril in 2-(2-Imino-5-phenyl-2,3-dihydro-oxazol-3-yl)-4,6-dimethyl-pyrimidin um. Aus diesem werden durch Kochen in Alkoholen mit 4-Methyl-benzolsulfonsaure als Katalysator 2-Alkoxy-l-(4,6-dimethyl-2-pyrimidyl)-4-phenyl-imidazole oder durch Erhitzen mit primaren oder sekundaren Aminen ebenfalls in Gegenwart von 4-Methyl-benzolsulfonsaure 2-Alkylamino-l-(4,6-dimcthyl-2-pyrimidyl)-4-phe-nyl-imidazole erhalten374 ... [Pg.83]

Amino-l,3,4-oxadiazole konnen fur die Einfuhrung heterocyclischer Substituenten iiber eine Ringumwandlung eines anderen labilen Heterocyclus genutzt werden. So reagiert 2-Amino-5-phenyl-l,3,4-oxadiazol mit 4-Benzyliden-2-methyl-5-oxo-4,5-dihydro-l,3-oxazol zu 2-(4-Benzyliden-2-methyl-5-oxo-4,5-dihydro-lH-imidazolo)-5-phenyl-1,3,4-oxadiazol649 (70% Schmp. 258°). [Pg.606]

Zu 6,38 g (23,7 mmol) 4,4-Bis-[2-methyl-allyl]-5-oxo-2-phenyl-4,5-dihydro-1,3-oxazol in 30 ml Methanol wird eine Losung von 6,00 g (149,6 mmol) Nalriumhydroxid in 25 ml Methanol/Wasser (2 3 Vol.) unter Eiskiihlung getropft. Man riihrt 2d bci 25° (Umsatzkontrolle durch DC), zieht das Methanol ab und uckstand aus F.ssigsaure-ethylester umkristallisiert Ausbeute 5,65 g (83%) Schmp. 183-185°. [Pg.411]

Methyl-2-phenyl-4,5-dihydro-oxazole-4-carboxylic acid methyl ester " (2.50 g, 11.4 mmol)... [Pg.42]

The flask was fllled with (45,55)-4-methyl-2-phenyl-4,5-dihydro-oxazole-4-carboxylic acid methyl ester (2.50 g) and 70 mL of dry diethyl ether. The solution was cooled to —78 °C using a dry ice-acetone bath. [Pg.43]

The crude product was purifled by silica gel column chromatography using pentane/diethyl ether (6 1) as eluent to yield 3.43 g (9.23 mmol, 81%) of (45,55)-2-(5-methyl-2-phenyl-4,5-dihydro-oxazol-4-yl)-l,3-diphenyl-propan-2-ol as a white foam. [Pg.43]

SYNTHESIS OF (45, 55)-[(f -l,5-CYCLOOCTADIENE)- 2-(2-PHEN YL-5-METHYL, 5-DIHYDRO-OXAZOL-4-YL)-1,3-DIPHENYL-2-DIPHENYLPHOSPHINITE-PROPANE IRIDIUM(I)]-TETRAKIS[3,5-BIS(TRIFLUOROMETHYL)PHENYL]BORATE... [Pg.45]

The Schlenk flask was charged with [Ir(COD)Cl]2 (83 mg) and 2mL of dry dichloromethane. (45,55)-(9- [ 1 -Benzyl-1 -(5-methyl-2-phenyl-4,5-dihydro-oxazol-4-yl)-2-phenyl-ethyl]-diphenylphosphinite (125 mg) was dissolved in anhydrous dichloromethane (5mL) under an argon atmosphere, and added to the metal precursor. The so-formed orange/yellow solution was heated at reflux for 1 h. [Pg.46]

Cyclooctadiene)- 2-(2-phenyl-5-methyl-4,5-dihydro-oxazol-4-yl)-l,3-diphenyl-2-diphenylphosphimte-propane mdium(l)]-tetrakis[3,5-bis(tri-fluoromethyl)phenyl]borate (1.72mg, l.Opmol). The catalyst is available from Strem Chemicals, Inc. (catalogue no. 77-5020). [Pg.47]

Amino-4-hydroxy-8-methyl- E19d, 689 (aus 1,3-Oxazol-Der.) 7-Aminoxy-4-methyl- El 6a, 264 Furan 3,4-Dihydroxy-5-imino-2-phenyl-2,5-dihydro- VI/2, 698 Glyoxylsaure (3,4-Dimethoxy-phenyl)- -nitril E13/2, 1158 (Alkohol - Keton)... [Pg.719]

Oxazol 4-Hydroxy-4-methyl-5-oxo-3-phenyl-4,5-dihydro- E13/2, 1137 (Hydrooxylierung)... [Pg.719]

Oxazol (4S, 5S )-5-Methyl-4-nitro-3-(4-nitro-phenyl)-4,5-dihydro- E16d, 243 (En—N02 + R-CNO)... [Pg.722]

Oxazol 3-(4-Brom-phenyl)-2-methyl-2,5-dihydro- E15/1, 741 (aus 4,5-H2 - 1,2-oxazolium-Salz)... [Pg.723]

Oxazol 4-Cyan-4-methyl-5-phenyl-4,5-dihydro- E19d, 681 (R-NC + R-CHO)... [Pg.855]

Oxazol 5-(4-Brom-phenyl)-4-ethoxy-5-methyl-4,5-dihydro-E19d, 682 (R-NC + Keton)... [Pg.1011]

Oxazol (+ )-trans-(4R,5R)-2-Ethyl-4,5-dihydro-4-methyl-5-phenyl- E21a, 1020... [Pg.1025]

H-l,4-Benzoxazine 2,3-Dimethoxy-carbonyl-4-hydroxy-6-methyl-E9a, 145 (1,2-Benzoquinon-oxim/ Cu + ROOC-C = C —COOR) Kohtensaure tert.-Butylperoxyes.ter-phthalimidoester E13/1, 255 (C-Cl -> C-O-OR) 1,2-Oxazol rro i-3,5-Dimethoxycar-bonyl-4-phenyl-4,5-dihydro- -2-oxid E14b, 927 (R-N02 + R-CHO)... [Pg.1132]

Diphenyl-3-methyl-3-(4-melhyl-5-oxo-2-phenyl-4,5-dihydro-l,3-oxazol-4-yl)- 2846, 3149... [Pg.3386]

Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...