1.4- Dimethoxybenzene hydroquinone dimethyl ether

This is exemplified in a-naphthol formation (Eq. 22.2) or in the synthesis of / -methoxybenzonitrile from 1,4-dimethoxybenzene (hydroquinone dimethyl ether) [24] ... 

Place 6 g of 1,4-dimethoxybenzene (hydroquinone dimethyl ether) in a 125-mL Erlenmeyer flask, add 10 mL of /-butyl alcohol and 20 mL of acetic acid, and put the flask in an ice-water bath to cool. Measure 10 mL of concentrated sulfuric acid into a 50-mL Erlenmeyer flask, add 10 mL of 30% fuming sulfuric acid or 20 mL of concentrated sulfuric acid, and put the flask, properly supported, in the ice bath to cool. For good thermal contact the ice bath should be an ice-water mixture. Put a thermometer in the larger flask and swirl in the ice bath until the temperature is in the range 0-3°C, and remove the thermometer (solid, ifpresent, will dissolve later). Don t use the thermometer as a stirring rod. Clamp a small separatory funnel in a position to deliver into the 125-mL Erlenmeyer flask so that the flask can remain in the ice-water bath, wipe the smaller flask dry, and pour the chilled sulfuric acid solution into the funnel. While swirling the 125-mL flask in the ice bath, run in the chilled sulfuric acid by rapid drops during the course of 4-7 min. 

H.42) Benzene, 1,4-dimethoxy-, 1,4-dimethoxybenzene, hydroquinone dimethyl ether, quinol dimethyl ether, p-methoxyanisole [150-78-7] FEMA 2386... 

Synonyms Anisole, p-methoxy- Benzene, 1,4-dimethoxy- 1,4-Dimethoxybenzene Dimethyl ether hydroquinone Dimethyl hydroquinone Dimethylhydroquinone ether DMB DMHQ HQDME Hydroquinone dimethyl ether p-Methoxyanisole Quinol dimethyl ether Classification Aromatic ether Definition Obtained by methylation of hydroquinone using dimethyl sulfate and alkali Empirical CsHio02 Formula C6H4(OCH3)2... 

Hydroquinone diethylol ether Hydroquinone di (2-hydroxyethyl) ether Hydroquinone di-(P-hydroxyethyl) ether. See Hydroquinone bis (2-hydroxyethyl) ether Hydroquinone dimethyl ether. See p-Dimethoxybenzene Hydroquinone ethyl ether CAS 622-62-8 FEMA 3695... 

This benzophenone can be obtained by total dealkylation of its tetramethyl ether by the usual methods. This one (m.p. 109°) was prepared by reaction of dimeth-ylgentisic acid chloride (2,5-dimethoxybenzoyl chloride) with hydroquinone dimethyl ether (2,5-dimethoxybenzene) in the presence of aluminium chloride in carbon disulfide [409],... 

See Pigment violet 19 Quinoclamine. See 2-Amino-3-chloro-1,4-naphthoquinone Quinol. See Hydroquinone 8-Quinol. See 8-Hydroxyquinoline Quinol dimethyl ether. See p-Dimethoxybenzene Quinoline... 

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