1-tert-Butyl-3-methylbenzene

Hydroperoxide 172 is reduced to 173 by triphenylphosphine. 2,5-Di-tert-butyl-l,3-benzoquinone is isomerized to 174 by boiling with 43 in methylbenzene isomerizations of this type normally must be induced pho-... 

Formula Weight = 178.8 4-tert-butyl-6-methylbenzene- 1,3-diamine 3 4-tert-butyl-2-methylbenzene- 1,3-diamine CHo... 

BUTYLATED H T)ROXYTOLUENE BUTYLHYDRO-XYTOLUENE CAO 1 CAO 3 CATALIN CAO-3 CHEMANOX 11 DBMP DBPC (technical grade) DIBUTYLATED HYDROXYTOLUENE 2,6-DI-tert-BUTYL-p-CRESOL (OSHA, ACGIH) 2,6-DI-tert-BUTYL-1-HYDROXY-4-METHYLBENZENE 3,5-DI-tert-BUTYL-4-HYDROXYTOLUENE 2,6-DI-terc,BUTYL-p-KRESOL (CZECH) 2,6-DI-tert-BUTYL-p-METHYLPHENOL 2,6-DI-tert-BUTYL-4-METHYLPHENOL FEMANo. 2184 4-HYDROXY-3,5-DI-tert-BUTYLTOLUENE IMPRUVOL... 

Synonyms 2,6-di-fert-butyl-i-hydroxy-4-methylbenzene 2,6-di-tert-butyl-4-methylphenol 3,5-di-tert-butyl-4-hydroxytoluene 4-hydroxy-3,5-di-terf-butyltoluene BHT butylhydroxytoluene dibutylated hydroxytoluene butylated hydroxytoluene di-n-butyl hydroxytoluene 4-methyl-2,6-di-t-butyl-phenol 2,6-bis(i,i-dimethylethyl)-4-methylphenol Annulex BHT Antracine 8 Catalin CAO-3 Dalpac DBPC Embanox BHT Hydagen DEO Impruvol lonol CP Sustane Tenox BHT Topanol OC and o Vianol di-ferf-butyl-p-cresol bis(i,i-dimethylethyl)-4-methylphenol Topanol... 

Butylated hydroxytoluene (BHT) is a common preservative added to cereals and other dry foods. Its systematic name is 1-hydroxy-2,6-di-tert-butyl-4-methylbenzene (where tert-butyl is 1,1-dimethylethyl). Draw the structure of BHT. 

Why are the two favored products, ortho and para, not formed in equal amounts Frequently, the answer is steric effects. Thus, attack ortho to an existing substituent, especially when it is bulky, by an electrophile (again, especially when bulky) is sterically more encumbered than para attack. Therefore, para products often predominate over their ortho isomers. In the bromination of methylbenzene (toluene), this predominance is small. However, similar halogenation of 1,1-dimethylethyl (tert-butyl) benzene results in a much larger para ortho ratio (—10 1). 

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