Brunner, Otto published the artcileSynthesis of 1-methyl-2-ethyl- and 1-ethyl-2-methylnaphthalene, Application of 2-Methyl-4-phenylbutanoic acid, the publication is Monatshefte fuer Chemie (1934), 76-9, database is CAplus.
PhCH2CH2Br and EtCH(CO2H)2 with Na in PhMe give di-Et (¦Â-phenylethyl)ethylmalonate, b11 186-7¡ã; hydrolysis and removal of CO2 gives ¦Ã-phenyl-¦Á-ethylbutyric acid, b11 172-3¡ã; concentrated H2SO4 gives 2-ethyl-1-keto-1,2,3,4-tetrahydronaphthalene, b11 140-5¡ã; MeMgI gives 1-methyl-2-ethyl-¦¤1-dihydronaphthalene, b11 135-45¡ã; heating with S at 260-90¡ã for 1 hr. gives 1-methyl-2-ethylnaphthalene, b11 140-5¡ã (picrate, orange, m. 97¡ã; styphnate, yellow, m. 114¡ã). ¦Ã-Phenyl-¦Á-methylbutyric acid, b11 155-65¡ã; concentrated H2SO4 gives 2-methyl-1-keto-1,2,3,4-tetrahydronaphthalene, b11 140-50¡ã, which yields with EtMgBr, as above, 1-ethyl-2-methylnaphthalene, b11 135-45¡ã (picrate, golden yellow, m. 110-1¡ã; styphnate, yellow, m. 141¡ã).
Monatshefte fuer Chemie published new progress about 1949-41-3. 1949-41-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene, name is 2-Methyl-4-phenylbutanoic acid, and the molecular formula is C11H14O2, Application of 2-Methyl-4-phenylbutanoic acid.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia