Diethoxy dimethyl

Beilstein Handbook Reference) BRN 1736110 CCRIS 1321 CD5600 Diethoxy(dimethyl)-silane ... 

Dimethyl diethoxy silane Trimethyl ethoxy silane Sodium hydroxide... 

The diethoxy derivative 4 can be transformed to the monolactame 5 by stirring an ethereal solution with silica gel, or used in substitution reactions to afford other derivatives, e g. JV,Ar,jV, jV -tetraethyl-4,8-dimethyl-l, 3,5,7-tetrazocine-2,6-diamine (6).23-24... 

The carbonyl group can be deprotected by acid-catalyzed hydrolysis by the general mechanism for acetal hydrolysis (see Part A, Section 7.1). A number of Lewis acids have also been used to remove acetal protective groups. Hydrolysis is promoted by LiBF4 in acetonitrile.249 Bismuth triflate promotes hydrolysis of dimethoxy, diethoxy, and dioxolane acetals.250 The dimethyl and diethyl acetals are cleaved by 0.1-1.0 mol % of catalyst in aqueous THF at room temperature, whereas dioxolanes require reflux. Bismuth nitrate also catalyzes acetal hydrolysis.251... 

Dimethyl 5,8-diethoxy-2,3-quinoxalinedicarboxylate Dimethyl 2,3-dimethyl-5,6-quinoxalinedicarboxylate Dimethyl 2,3-dimethyl-6,7-quinoxalinedicarboxylate Dimethyl 6,7-dimethyl-2,3-quinoxalinedicarboxylate... 

Citral diethyl acetal [7492-66-2], l,l-diethoxy-3,7-dimethyl-2,6-octadiene... 

Diethoxy triphenylphosphorane, 109 Dimethyl(methylthiosulfonium) tetra-fluoroborate, 121 Hexamethylphosphoric triamide,... 

SYNTHESIS A solution of 12.1 g N,N,N ,N -tetramethylethylenediamine and 16.6 g of 1,3-diethoxy benzene was made in 200 mL 30-60 °C petroleum ether. This was stirred vigorously under a N2 atmosphere and cooled to 0 °C with an external ice bath. There was added 66 mL of 1.6 M butyllithium in hexane. The stirred reaction mixture became a little cloudy and then gradually formed a white granular precipitate. This was brought to room temperature, stirred for 0.5 h, and returned again to 0 °C. There was added 9.45 g of dimethyl disulfide which converted the loose precipitate to a creamy texture. The reaction was exothermic. After being held 0.5 h at reflux temperature, the reaction mixture was added to 600 mL dilute H2S04. There was the immediate formation of white solids which were insoluble in either phase. The petroleum ether phase was separated, and the aqueous phase extracted... 

Dimethyl-(2-phosphatidyloxy-ethyl)- E2, 506 Tris-[2-diethoxyphosphano-ethyl]- E2, 348 T ris-[diethoxy-phosphoryl]-... 

Dibutyloxy-phosphoryl)-ethyl-methyl- XII/2, 117 (Dicthoxy-phosplioryl)-ciicthyl XII/2, 117 (Diethoxy-phospboryl)-dimethyl- XII/2, 117 (Diethoxy-phosphoryl)-ethyl-(3-methyl-butyl)-XII/2, 117... 

Dimethylamino-phenyl)-phcnyl- XII/1, 238 Dimethyl- -Anhydrid E2, 175, 176 Dimethyl- -anilid XII/1, 263 Dimethyl- -azid E2, 244 Dimethyl- -benzimidazolid E2, 232 Dimethyl- -2-benzimidazolylamid E2, 231 Dimethyl- -benzylamid E2, 164 Dimethyl- -(2-chlor-ethylester) XII/1, 249 Dimethyl- -chlorid XII/1,162, 242, 245, 249 E2, 139, 160, 163, 176, 231, 232, 234 aus Dimethylphosphinigsaure und Chlor E2, 160 aus Dimethylphosphinsaurc und Phosgen E2, 162, 164 Phosphor(V)-chlorid XII/1, 241 aus Dimethyl-thiophosphinsiiure-chlorid und Sulfurylchlorid XII/1, 244 Dimethyl- -[(diethoxy-methyl-silyl]-methvlester] aus Chlormethyl-diethoxy-methyl-silan und Natrium-dimethylphosphinat E2, 213 Dimethyl- -(dimethylaluminylester)-methylimid E2, 293... 

Bis-[ diethoxy-phosphor>loxy]-dimethyl- XII/2, 579 Bis-[diethoxy-thiophosphoryloxy]-diethoxy- XII/2,... 

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