4- Bromo-6-methyl-1,2-dimethoxy

Dimethoxy-6,7-dimethylquinoxaline gave a separable mixture of 6-bromo-methyl-2,3-dimethoxy-7-methylquinoxaline (165, R = H) and 6,7-bis(bromo-methyl)-2,3-dimethoxyquinoxaline (165, R = Br) pSfBS, BZ2O2, CCI4, reflux. 

Benzoic acid, 2-benzoyl-, methyl ester [606-28-0,21204-864], 63 Benzoic acid, 4-bromo- [586-76-5], 86 Benzoic acid, 4-chloro- [74-11-3], 86 Benzoic acid, 2-[(diethylamino)carbonyl]-, methyl ester [2659344-2], 63 Benzoic acid, 2,4-dimethoxy- [91-52-1 ], 31 Benzoic acid, 3,4-dimethoxy- [93-07-2], 31 Benzoic acid, 3,4-dimethyl- [619-04-5], 31 Benzoic acid, 3,5-dimethyl- [499-06-9], 86 Benzoic acid, 4-hydroxy- [99-96-7], 60 Benzoic acid, 3-methyl- [99-04-7], 86 Benzoic acid, 4-methyl- [99-94-5], 86 Benzoic acid, 2,4,6-tnmethyl- [480-63-7],... 

Bromo-3-methyl-1,4-naphthoquinone 2-Bromo-1,4-dimethoxy-3-methylnaphthalene 88... 

An alternative regioselective synthesis of 2-anilino-5-methyl-l,4-benzoquinone (842) was developed using 2-bromo-6-methyl-l,4-benzoquinone (846) (route A) and 4,4-dimethoxy-2-methylcyclohexa-2,5-dienone (849) (route B) as synthetic equivalents for methyl-1,4-benzoquinone (841) (623) (Scheme 5.102). 

Ethanone, 1- [3-(l,l-dimethylethyl)-4-methoxy-5-nitrophenyl Benzaldehyde, 2 (l,l-dimethylethyl)-4-methoxy-5-nitro Benzene, 1,4-BIS- (1, l-dimethylethyl)-2 methoxy-5-nitro Benzene, 1-(1, l-dimethylethyl)-2, 5-dimethoxy-4-nitro Benzene, 1-(1, l-dimethylethyl)-2-methoxy-4 methyl-5-nitro Benzaldehyde, 5- (1, l-dimethylethyl)-2-methyl-3-nitro Benzaldehyde, 2- (1, l-dimethylethyl)-4,5,6-trimethyl-3-nitro Benzene, 5-(l, l-dimethylethyl)-2-methoxy-l, 3-dinitro Benzene, 1-(1, l-dimethylethyl)-4-methoxy-2-methyl 3-5-dinitro Benzene, 2-bromo-5- (1, l-dimethylethyl)-4-methoxy-l,... 

METHYL-DOB 4-BROMO-2,5-DIMETHOXY-N-METHY LA MPHET AMINE... 

Alkoxy derivatives of biphenyl can be obtained either from alkoxy-anilines or by coupling with alkoxybenzenes. From diazotized p-bromo-aniline and anisole a 20% yield of 4-bromo-2 -methoxybiphenyl and a 7% yield of 4-bromo-4 -methoxybiphenyl are obtained. In connection with their studies on Cannabis Indica, Ghosh, Pascall, and Todd u prepared the highly substituted biphenyl compound, 2-cyano-5-methyl-2, 5 -dimethoxy-4 -n-amylbiphenyl (VII), in 27% yield from the nitrosoacetyl derivative of 2-cyano-5-methylaniline and 2,5-dimethoxy-n-amylben-zene. 

A new, efficient synthesis of ubiquinone (249) has been described.115 In the key step, 6-bromo-2,3-dimethoxy-5-methylhydroquinone diacetate (257) is treated with l,l-dimethyl-7r-allyl-, 7r-geranyl-, 7r-solanesyl-, ir-decaprenyl-, or 7r-phytyl-nickel bromide (258)—(262) in HMPA at 60 °C, to afford a 70% yield of 2,3-dimethoxy-5-methyl-6-prenylhydroquinone diacetate (263). Ubiquinones-1, -2, -9, and -10 (250)—(253) and 6, 10, 14 -hexahydroubiquinone-4 (254) have been prepared by this method. The preparation of tritium-labelled 5-demethoxy-ubiquinone-9 (255) has been described.116... 

The reaction between dimethyl 2-bromo-l-phenylpropylidenemalonate and sodium methoxide in methanol affords a complex reaction mixture consisting of dimethyl 2-methyl-3-phenyl-2-cyclopropene-l,l-dicarboxylate (303,19%), dimethyl (2,2-dimethoxy-l-methyl-2-phenylethyl)malonate (304, 4%), dimethyl 2-methoxy-l-phenylpropyl-idenemalonate (305, 11%), dimethyl 2-bromo-l-phenyl-1-propenylmalonate (306 -isomer, 10% Z-isomer, 13%) and dimethyl (l,2-dimethoxy-l-phenylpropyl)malonate... 

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