4.7- dimethoxy-2-methyl

Benzo[b]furan-2-carboxylic acid, 3,6-dimethoxy-, methyl ester UV, 4, 589 <71AJC1883> Benzo[b]furan-2-carboxylic acid, 5,6-dimethyl-, methyl ester... [Pg.8]

Oxo-3,4-dihydro-2-quinoxalinecarboxylic acid (36, R = OH) gave 3-oxo-3,4-dihydro-2-quinoxalinecarbonyl chloride (36, R = Cl) (neat SOCI2, reflux, 1 h 6,7-dimethoxy -methyl-3-oxo-3,4-dihydro-2-quinoxalinecarboxylic acid (37, R = OH) gave 6,7-dmieihoxy-4-methyl-3-oxo-3,4-dihydro-2-quinoxalinecarbonyl chloride (37, R = C1) (likewise >91%). ... [Pg.323]

The chiral auxiliary can be recycled, since methanolysis of the 1-alkylated 3-trimethylsilyl-2-propynamines regenerated prolinol ether, a precursor of (S)-l-[(dimethoxy)methyl]-2-(meth-Oxymethyl)pyrrolidine. [Pg.694]

Sehr einfach einzufuhrende und abspaltbare (s. S. 99 f.) Schutzgruppen fiir die 1-Position von Imidazolen sind die Dimethoxy-methyl- und die Diethoxy-methyl-Gruppe. Die 1 -(Dialkoxy-methyl)-imidazole werden durch Erhitzen von Imidazolen mit Orthoameisensaure-tricstern unter Katalyse mit 4-Methyl-benzolsulfonsaure erhalten713 [Vorschrift fiir I-(Diethoxy-methyl)-imidazol s. Bd. E5/1, S. 136]. [Pg.131]

NO, Xr-ccHi OCHj H2/Raney-Ni/CH3OH 7000 kPa 40-70° 90 min 3-( Dimethoxy-methyl)-anilin 67-78 4... [Pg.845]

Formyl-2-methylfuran was converted in 75% yield into derivative 319 by electrolytic methoxylation. A corresponding mixture of cis-diols (320) was treated with Dowex W-50 ion-exchange resin in methanol for four days, to afford 5-deoxy-3-C-(dimethoxymethyl)-DL-eryf/rro-4-pentulose dimethyl acetal (321). Reduction of this compound with lithium aluminum hydride or sodium borohydride gave a mixture of 5-deoxy-3-C-(dimethoxymethyl)pentoses, which was separated by column chromatography on silica gel, to give206 DL-streptose tetramethyl acetal (322) and the isomeric 5-deoxy-3-C-(dimethoxy-methyl)-DL-ribose dimethyl acetal 323 (hjxo ribo = 13 7). Detailed, combined gas-liquid chromatographic-mass spectrometric analysis of the compounds related to streptose (in the form of their trimethyl-silyl derivatives) has been described.207... [Pg.64]

Methyl 6,6-dimethoxyhexanoate Hexanoic acid, 6,6-dimethoxy-, methyl ester (9) (25176-55-0)... [Pg.156]

Dimethoxy-methyl-silyl)-meth-oxy]-1-fluoro- ElOa, 602 (Educt)... [Pg.777]

An unexpected formation of 2,4-disubstituted-l, 3,5-triazines (3) occurs when 3-dimethoxy-methyl-2-(lV-cyanamino)thiazolidine (2) reacts with secondary amines. When the reaction is carried out in the presence of methanol or ethanol, or with a mixture of amines, a mixture of substituted products is obtained. The proposed mechanism tor the reaction is shown in Scheme 2 [94CC2301]. [Pg.256]

Silan (Dimethoxy-methyl)-trimeth-oxy- El9b, 1642 [Si2Cl6 + HC(OR),]... [Pg.333]

Isopropyl-2-methoxy- VI/3, 304 Ethen l-Ethoxy-l-(2-methoxy-ethoxy)- VII/4, 350 Furan 2-(Dimethoxy-methyl)-tetrahydro- IV/lb, 128/E14a/1, 527 (aus 5,6-H2—4H-pyran + H3C-OH)... [Pg.421]

Cyclopenten 3-(Dimethoxy-methyl)-E14a/1. 560 [SiR3 - CH(OR)2] Cyclopropau... [Pg.529]

Silan Dimethoxy-methyl-phenyl-thio- XIII/5, 223... [Pg.652]

E16d, 294 (Nitrierung) Benzonitril 2-(Dimethoxy-methyl)-E3, 357 (aus Cl/O-Acetalen)... [Pg.742]

Pyrido 2,3-d pyrimidin 2-Amino-6-(dimethoxy-methyl)-4-hydroxy-E9c, 151 (NH2 - OH)... [Pg.753]

Cyclopropan l,l-Dichlor-3-(2,2-dimethoxy-ethyl)-2-(dimethoxy-methyl)- E17a, 653 (CHCI3/ NaOH + En)... [Pg.805]

Hexen 4-(Dimethoxy-methyl)-2-methyl-5-oxo- E14a/1, 575 [En-amin + CH(OR)3/BF3] 4-Hexensaure 2-Hydroxy-3-methyl- -isopropylester E21b, 1518 [H3C - CH = CH CH(CH3) -SnR3 + OHC COOR] Hydroperoxid l,1-Dimethyl-4-oxo-2-octenyl- E13/1, 66 (H - O-OH)... [Pg.811]

Fnran 2,5-Dimethoxy-3-(dimethoxy-methyl)-2-methyl-2,5-dihydro-E14a/I, 448 (3-CHO-fu-ran + R —OH)... [Pg.812]

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