92115-32-7

Upstream product

• 15827-36-8 2,2,4,4-Tetramethyl-1,3-cyclobutanedione bis-<1,2-ethanediyl acetal> 
• 591-51-5 phenyllithium 
• 109632-78-2 1,1,3,3-Tetramethyl-5,6-dioxaspiro<3,4>octan-2-one 
• 933-52-8 2,2,4,4-tetramethyl-1,3-cyclobutanedione 
• 264283-49-0 1,1,3,3-tetramethyl-2-phenyl-5,8-dioxa-spiro[3.4]octan-2-ol 
• 16424-63-8 2,2,4-trimethyl-1-phenylpentane-1,3-dione 

Downstream Products

• 16424-63-8 2,2,4-trimethyl-1-phenylpentane-1,3-dione 

Relevant academic research and scientific papers

3-Aryl-3-hydroxy-2,2,4,4-tetramethylcyclobutanones and related compounds

3-aryl-3-hydroxy-2,2,4,4-tetramethylcyclobutanones and 1-aryl-2,2,4-trimethyl-1,3-pentadiones were prepared from arylation of 1,1,3,3-tetramethyl-5,8-dioxapiro [3,4]octan-2-one followed by hydrolysis using THF and HCl respectively.

PHOTOCHEMICAL REACTION OF PHENYL-SUBSTITUTED 1,3-DIKETONES.

Irradiation of 2,2-dimethyl-1-phenyl-1,3-diketones with 3-ethyl or 3-isopropyl substituents gave type II cyclization product, 3-hydroxy-2,2,4-trimethyl-3-phenylcyclobutanone or 3-hydroxy-2,2,4,4-tetramethyl-3-phenylcyclobutanone, along with type I cleavage products. The type II cyclization/type I cleavage ratio is greater with a 3-isopropyl group than with a 3-ethyl group. A similar irradiation of 2,2-dimethyl-1-phenyl-1,3-butanedione gave type I cleavage products and no type II cyclization product. Irradiation of 2,4-dimethyl-1-phenyl-1,3-pentanedione gave 3-hydroxy-2,2,4-trimethyl-3-phenylcyclobutanone and propiophenone.