Premasagar, Vuppalapaty published the artcileMethanesulfonic acid catalyzed cyclization of 3-arylpropanoic and 4-arylbutanoic acids to 1-indanones and 1-tetralones, Computed Properties of 1949-41-3, the publication is Journal of Organic Chemistry (1981), 46(14), 2974-6, database is CAplus.
The title cyclizations were carried out by heating anhydrous MeSO3H with the 3-arylpropanoic or 4-arylbutanoic acid at 110-15 and 90-5¡ã, resp. Using MeSO3H as a Friedel-Crafts catalyst is not promising (2,4-Me2C6H3COMe yield from m-xylene was ?30%).
Journal of Organic Chemistry 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, Computed Properties of 1949-41-3.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia