2555-31-9Relevant articles and documents
A Facile Synthesis of 4-Aryl-2H-1-benzopyran-2-ones
Ahluwalia, Vinod K.,Singh, Daljeet,Singh, Rishi P.
, p. 869 - 872 (1985)
Reaction of 2-hydroxybenzophenones (1, 3, 7, 8) with ethoxycarbonylmethylenetriphenylphosphorane affords 4-aryl-2H-1-benzopyran-2-ones (2, 4-6) in excellent yields. - Keywords: 4-Aryl-2H-1-benzopyran-2-ones; Ethoxycarbonylmethylenetriphenylphosphorane; Friedel-Crafts reaction; 2-Hydroxybenzophenones; Wittig reaction
Photoinduced cyclization of alkynoates to coumarins with N-Iodosuccinimide as a free-radical initiator under ambient and metal-free conditions
Wang, Zhihui,Li, Xuezhi,Wang, Lei,Li, Pinhua
, p. 1044 - 1051 (2019/01/25)
An efficient photoinduced strategy for the preparation of coumarins was developed. In the presence of N-iodosuccinimide (NIS) as a free-radical initiator and under LED (380–385 nm) irradiation and metal-free conditions, the reaction of alkynoates underwen
Rhodium(I)-Catalyzed Decarbonylative Aerobic Oxidation of Cyclic α-Diketones: A Regioselective Single Carbon Extrusion Strategy
Golime, Gangadhararao,Kim, Hun Young,Oh, Kyungsoo
supporting information, p. 942 - 945 (2018/02/22)
A rhodium-catalyzed decarbonylative aerobic oxidation of cyclic α-diketones has been developed for the first time, where the regioselective formations of α-pyrones and isocoumarins have been achieved. The current decarbonylative aerobic oxidation pathway proceeds via the C-C bond cleavage followed by a C-O bond formation, representing a biomimetic oxidation approach to unsaturated six-membered cyclic lactones. The unique ability of rhodium catalysts to induce the decarbonylative aerobic oxidation opens up a new synthetic toolbox that utilizes the "regioselective single carbon" extrusion strategy.