The prevalence of solvent effects in heterogeneous catalysis in condensed media has motivated developing quantitative kinetic, spectroscopic, and their interactions with reaction intermediates and transition states. Product Details of 4971-56-6
Photolysis (lambda=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 alpha- vs. beta-cleavage products obtained from the primarly formed acyl-vinyloxy biradical.
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Reference：
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem