2,5- Dimethy 1-3 - -6- 1 -hydroxy

Al Preparation of 7-Hydroxy-4,8-Dimethy/coumarin Chilled ethyl acetoacetate (157 ml, 1.20 mols) followed by 2-methyl-resorcinol (130 g, 1.04 mols) was dissolved in well-stirred concentrated sulfuric acid (600 ml) at such a rate as to keep the temperature below 10°C (ice bath). The stirred solution was allowed to warm gradually and after 3 hours was added to water (ca 8 liters) with mechanical stirring. The product was collected, washed twice with water, and dried at 70° to 80°C until the first sign of darkening. Yield 191.3 g (95.4%). Recrystallization from aqueous ethanol gave 7-hydroxy-4,8-dimethylcoumarin as colorless needles, MP 260.5° to 261°C. In dilute sodium hydroxide, the compound gives a yellow solution which exhibits blue fluorescence. [Pg.1551]

Ylid structure, behavior of thiazolium salts in basic medium, 31 of 3,4-dimethy 1-5-0-hydroxy-ethylthia-zolium iodide, in basic medium, 35 of nitrophenacy] group, in basic medium, 33... [Pg.336]

Di(phenylol)-dimethy l-me thane or Di( hydroxy-phenyU-dimetbyl-metkane,... [Pg.363]

Isoxazolo[5,4-6]pyridine, 3,5-dimethy 1-,3C NMR, 6, 620 (79S449) Isoxazolo[5,4-6]pyridine, 3-methyl- H NMR, 6, 619 (77JHC435) Isoxazolo[5,4-6]pyridine, 3-methyl-5-phenyl-13C NMR, 6, 620 (79S449) Isoxazolo[2,3-a]pyridinium, 5-bromo-4-hydroxy- H NMR, 6, 619 <7UCS(C)1196>... [Pg.33]

Acridine, 9,10-dihydro-9,9-dimethy 1-as antidepressant, 1, 169 Acridine, 9-formyl-synthesis, 2, 507 Acridine, 3-hydroxy-formylation, 2, 322 Acridine, 9-hydroxy-N- oxide... [Pg.509]

ASYMMETRIC TRANSAMINATION (S)-15-Aminomethy I-14-hydroxy-5,5-dimethy 1-2,8-dithia(9](2,5)-pyridinophane. (2R, 4S, 5R)-2-0-(N, N -Dimethylhydroxylammo)-3,4-dimethyl-5-phenyl-l,3,2 oxazaphosphoIidene-2-one. [Pg.309]

Oxo-2-penten — l-Hydroxy-l-methyI-2-butenphosphonsdure-dimethy tester ... [Pg.357]

Imidazolidin 3,4-Dimethy]-2-oxo-l-phenyl- E4, 376 (Umamidier.) lH-lndazol l-Butyl-3-hydroxy- E8b, 791 (Ar—NR —CO —Cl 4-NaN3)... [Pg.894]

Benzoxazol 2-(l,l-Dimethy]-2-propenyl)- E8a, 1150 [Cl -> C(CH3)2-CH=CH2] lH-Carbazol 4a-Hydroxy-2,3,4,4a-tetrahydro- IV/lc, 483 Cyclobutan 1-Benzyl-l-cyan-3-hydroxy- E17e, 67 [(2-CN-ethyl) — oxiran + R —MgX] Cyclopentan-(spiro-2)-2,3-dihydro-indol - -3-oxo- VII/2a, 1051 Cyclopropan 2-Cyan-l-methoxy-2-methyl-l-phenyl- E17a, 764 (RO — CAr = Cr + En)... [Pg.1004]

Imidazolidin 3-(4-Chlor-phenyl)-l,5-dimethy -5-ethyl-4-hydroxy-2-oxo- E14a/2, 429 (Oxo - OH)... [Pg.1158]

Benzyl-4-hydroxy-3-hydroxy-methyl- IV/ld, 217 (,S)-1 -(2-Hydroxy-2-pheny 1-ethyl)- -N-oxid E13/2, 1348 (kin. Racematspaltung/N-Oxygenie-rung) E16a, 415 (Amin-Oxidat.) Propan 1 - Acetoxy-2-dimethy lamino-... [Pg.1175]

SYNS 2,4-DiMETHY LPHENOL 4,6-DIMETHYL-PHENOL 1-HYDROXY-2.4-DIMETHYLBENZENE RCRA WASTE NUMBER LT 01 m-XYLENOL... [Pg.1438]

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