1, 2-Dioxetanes derived from 4, 5-dimethyl-2, 3-dihydrofuran and 4, 5-dimethyl-2, 3-dihydrothiophene. Synthesis via photooxygenation, activation parameters, and …
…, K Gollnick, K Knutzen-Mies
文献索引：Adam, Waldemar; Griesbeck, Axel G.; Gollnick, Klaus; Knutzen-Mies, Karen Journal of Organic Chemistry, 1988 , vol. 53, # 7 p. 1492 - 1495
Photooxygenation of 4, 5-dimethyl-2, 3-dhydrofuran (la) and 4, 5-dimethyl-2, 3- dihydrothiophene (lb) in a variety of solvents gave the respective 1, 2-dioxetanes 2a, b ([2+ 21 cycloaddition) as major products (82-90%) and the allylic hydroperoxides 3a, b and 4a, b (ene reaction) as minor products (10-18%). The 2, 3-dihydrofuran-derived dioxetane 2a shows higher thermal stability (AG*= 28.1 f 1.0 kcal/mol at 343 K) compared to other ...
