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2- Methylquinoxalines

Alkyl side chains in both pyrazines and quinoxalines are susceptible to halogenation by elemental halogens (28JCS1960, 68TL5931) and under radical conditions with NBS (72JOC511). Thus, bromination of 2-methylquinoxaline with bromine in the presence of sodium acetate... [Pg.167]

The bromination of 5,8-dimethoxyquinoxaline in methanol gives a mixture of 6-bromo and 6,7-dibromo compounds/ Treatment of 2-methylquinoxaline with bromine in acetic acid yields a mixture of 27% of 2 bromomethyl- and 37% of 2-dibromomethyl-quinoxaline." Thus in the absence of powerfully activating groups, side-chain rather than nuclear substitution takes place. [Pg.212]

Benzenediamine (123, R = H) and 1-benzamido-1-chloroacetone gave 2-methylquinoxaline (126) (Na2C03, H20-EtOH, reflux, 6 h 70%) homologs likewise. °... [Pg.21]

Methylquinoxaline with phenyUithium gave a separable mixture of 2-methyl-3-phenylquinoxaline (45), 2-methyl-3-phenyl-3,4-dihydroquinoxaline (46), and 2-methyl-2,3-diphenyl-1,2,3,4-tetrahydroquinoxaline (47) [PhLi (made in situ), Et20, <20°C, 90 min 20%, 45%, and 35%, respectively). [Pg.102]

Methylquinoxaline gave 2-(2-dimethylaminovinyl)quinoxaline (85) [Bu OCH-(NMe2)2, Me2NCHO, reflux, 15 min 98%]. ... [Pg.109]

Methylquinoxaline gave 2-(chloromethyl)quinoxaline (167) [1,3,5-trichloro-l,3,5-triazine-2,4,6(17/,3//,5//)-trione (168), CHCI3 reflux, 2h 75% after... [Pg.122]

Methylquinoxaline 4-oxide (264) selectively from 2-methylquinoxaline 1,4-dioxide (265) (ascorbic acid, H2O, 90°C, 5 h 58% homologs likewise) the natural amino acids in foods can also reduce such quinoxaline N-... [Pg.234]

Acetyl-3-methylquinoxaline 1-oxide (206) gave 2-methylquinoxaline 4-oxide (207) [HN(CH2CH2)20, MeCN, reflux, 24 h 30%]. ... [Pg.354]

Methyl-2-quinoxalinamine 8-Methyl-6-quinoxalinamine 3-Methyl-2-quinoxalinamine 1,4-dioxide 3-Methyl-2-quinoxalinamine 4-oxide 2-Methylquinoxaline... [Pg.424]

Benzoxadiazole 1-oxide (494) gave methyl 3-methyl-2-quinoxalinecar-boxylate 1,4-dioxide (493) [MeC(NH2)=CHC02Me, MeOH, reflux, 30 h 65%]587 or 2-methylquinoxaline 1,4-dioxide (495) (Me3SiCH2CH= CHNH2, dioxane-MeOH, 50°C, 15 min, then reflux, 10 min 41% note desilylation as well as deamination).219... [Pg.66]

See other pages where 2- Methylquinoxalines is mentioned: [Pg.167]    [Pg.169]    [Pg.215]    [Pg.219]    [Pg.220]    [Pg.221]    [Pg.447]    [Pg.304]    [Pg.22]    [Pg.56]    [Pg.108]    [Pg.128]    [Pg.192]    [Pg.361]    [Pg.361]    [Pg.368]    [Pg.375]    [Pg.375]    [Pg.384]    [Pg.395]    [Pg.403]    [Pg.404]    [Pg.415]    [Pg.415]    [Pg.415]    [Pg.433]    [Pg.22]    [Pg.56]    [Pg.108]    [Pg.122]    [Pg.128]    [Pg.192]   


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1- Methylquinoxaline-2,3-dione

1.2- Dihydro-3-methylquinoxaline

1.2.3.4- Tetrahydro-2-methylquinoxaline

2- -3-methylquinoxaline

2- -3-methylquinoxaline 1,4-dioxide

2- Acetoxymethyl-3-methylquinoxaline 1,4-dioxide

2- Amino-3-methylquinoxaline

2- Anilino-3-methylquinoxaline

2- Azido-3-methylquinoxaline 1,4-dioxide

2- Benzoyl-3-methylquinoxaline 1,4-dioxide

2- Benzyl-3-methylquinoxaline 1,4-dioxide

2- Bromo-3-methylquinoxaline 1,4-dioxide

2- Methylquinoxaline 4-oxide

2- Methylquinoxaline alkylation

2- Methylquinoxaline preparations

2- Methylquinoxaline reactions

2- Methylquinoxaline reduction

2- Methylquinoxalines acids

2-Acetoxymethyl-3-methylquinoxaline

2-Acetyl-3-methylquinoxaline

2-Acetyl-3-methylquinoxaline 1,4-dioxide

2-Acetyl-3-methylquinoxaline 1-oxide

2-Acetyl-3-methylquinoxaline oxidation

2-Acetyl-3-methylquinoxaline reduction

2-Acetyl-l,4-dihydro-3-methylquinoxaline

2-Bromo-6,7-dichloro-3-methylquinoxaline

2-Bromo-6,7-dichloro-3-methylquinoxaline 1,4-dioxide

2-Chloro-3-methylquinoxaline

2-Chloro-3-methylquinoxaline 1,4-dioxide

2-Chloro-3-methylquinoxaline 4-oxide

2-Chloro-3-methylquinoxaline 4-oxide oxidation

2-Chloro-3-methylquinoxalines

2-Chloro-5,7-dimethoxy-3-methylquinoxaline

2-Ethyl-3-methylquinoxaline

2-Iodo-3-methylquinoxaline

2-Isopropyl-3-methylquinoxaline

2-Methylquinoxaline, reaction with

2-methylquinoxaline, oxidation

2.3.6.7- Tetrachloro-5-methylquinoxaline

3- Methylquinoxaline-2-carboxaldehyde

3-Methylquinoxaline-2-carboxaldehyde 1,4-dioxide

5.6.8- Trichloro-7-methylquinoxaline

6-Fluoro-3-methylquinoxaline

6-Methoxy-3-methylquinoxaline

6-Methoxy-3-methylquinoxaline 4-oxide

6-Methylquinoxaline-5,8-diones

6.7- Dichloro-2,3-dimethoxy-5-methylquinoxaline

6.7- Dichloro-2- methylquinoxaline

6.7- Dichloro-2- methylquinoxaline 1,4-dioxide

Cyclization, l-methyl-3-ethyloxindole 2-methylquinoxaline from o-phenylenediamine

Methylquinoxaline orange

Oxidation, of 2-methylquinoxaline

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