3- -5-methyI

Glanzer K, Quack M and Tree J 1977 High temperature UV absorption and recombination of methyi radicais in shock waves 16th Int. Symp. on Combustion (Pittsburgh The Combustion institute) pp 949-60... 

Methylaniline Ethylaniline n-Propylaniline n-Butylaniline Benzylaniline 2 -MethyIbenzylamine N-Ethylbenzylamine 2 -Methyl o-toluidine N-Methyl m-toluidine 2 -MethyI p-toluidine N-Ethyl o-toIuidine N-Ethyl m-toIuidine 2S -Ethyl p-toluidine 2 -MethyI a-naphthylamine N-Methyl p-naphthylamine N-Phenyl- a-naphthylamine 2 -Phenyl-P-naphthylamine... 

Aminothiazole and derivatives have been reported in reactivity studies starting from 2-p-nitrophenylsulfenylaminothiazole (4) (32), 2-tritylaminothiazole (5) (33), 2-nitrothiazole (34,35), and 5-methyI-2-phenylimino-4-thiazolidinone (36) (Scheme 4). 

Imino-4-thiazolines are far more basic than their isomeric 2-aminothiazoles (see Table VI-1). They react with most electrophDic centers through the exocyclic nitrogen and are easily acylated (37, 477, 706) and sulfonated (652). The reaction of 2-imino-3-methyi-4-thiazoline (378) with a-chloracetic anhydride yields 379 (Scheme 217) (707). This exclusive reactivity of the exocyclic nitrogen precludes the direct synthesis of endocyclic quaternary salts of 2-imino-4-thiazolines. although this class of compounds was prepared recently according to Scheme 218 (493). 

Some studies on the quatemization of arylthiazoles have been published, among them the quatemization of 2-methyI-4-phenyl thiazole in various solvents (263). The order of reactivity is the following 2-methyl-4-phenyl > 2-methyI-4-(3-nitrophenyl) > 2-methyl-4-(2-chlorophenyl) > 2-methyl-4-(4-nitrophenyl). Introduction of a phenyl group in the... 

Propylene Dimer. The synthesis of isoprene from propjiene (109,110) is a three-step process. The propjiene is dimeri2ed to 2-methyl-1-pentene, which is then isomeri2ed to 2-methyl-2-pentene in the vapor phase over siUca alumina catalyst. The last step is the pyrolysis of 2-methyi-2-pentene in a cracking furnace in the presence of (NH 2 (111,112). Isoprene is recovered from the resulting mixture by conventional distillation. 

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