83814-60-2

Upstream product

• 83814-52-2 3-hydroxy-5,5-dimethyl-2-<2,2-dimethyl-1-(pyrrolidin-1-yl)>propylcyclohexa-2-en-1-one 
• 113768-46-0 4-(tert-butyl)-7,7-dimethyl-3,4,5,6,7,8-hexahydro-2H-<1>-benzopyran-2,5-dione 
• 15579-89-2 5-(2,2-dimethylpropylidene)-2,2-dimethyl-1,3-dioxane-4,6-dione 
• 126-81-8 dimedone 
• 630-19-3 pivalaldehyde 

Downstream Products

• 139484-15-4 C₂₁H₃₂O₄ 

Relevant academic research and scientific papers

Photochemical Synthesis of 2-Alkylidene-1,3-cycloalkanediones

Photolysis (λ=254 nm) of 4-(tert-butyl)-4,6,7,8-tetrahydro-7,7-dimethyl-2H-1-benzopyran-2,5(3H)-dione (3a) in t-BuOH affords 2-(2,2-dimethylpropylidene)-5,5-dimethyl-1,3-cyclohexanedione (1a) in 80percent yield via homolysis of the lactone O-CO bond and subsequent ketene elimination.

106. Photochemical Synthesis of Cyclic 2-(2,2,-Dimethylpropylidene)-1,3-Dicarbonyl Compounds

Photolysis (λ=254 nm) of 4-(t-Bu)-substituted -fused bi- and tricyclic pyrandiones 5 affords title compounds 4 in good yields as well a small amounts of spiroalkanediones 8.The alkyl-substitution pattern at C(4) of the pyran ring in 5 determines the relative amount of α- vs. β-cleavage products obtained from the primarly formed acyl-vinyloxy biradical.

Plant Growth Regulators in Eucalyptus grandis. V Synthesis of the G-Regulators

Problems associated with earlier synthetic approaches to the G-regulators have been overcome by the use of the Mannich reaction in aprotic media.Under these conditions the Mannich base formed from the reaction of 1,3-diketones and aldehydes is stabilized by internal hydrogen bonding and can be isolated in high yield.In aqueous acid rapid elimination occurs to give the 2-methylene 1,3-diketones, which first enolize then add oxygen to generate the G-regulator structure.The steric limitations of the reactions are examined.