γ-Cyclodextrin as a Catalyst for the Synthesis of 2-Methyl-3,5-diarylisoxazolidines in Water
作者:Giuseppe Floresta、Carmen Talotta、Carmine Gaeta、Margherita De Rosa、Ugo Chiacchio、Placido Neri、Antonio Rescifina
DOI:10.1021/acs.joc.7b00227
日期:2017.5.5
(γ-CD) in water has been developed to give substituted isoxazolidines. γ-CD was found to be highly efficacious in carrying out this reaction under an eco-friendly environment, affording moderate to excellent yields and, in some cases, excellent diastereomeric excess (up to >95%) at 100 °C in 8–12 h. The catalyst can be easily recuperated and recycled for several times without loss of activity. Water, an
Cucurbit[7]uril as a catalytic nanoreactor for one-pot synthesis of isoxazolidines in water
作者:Davide Gentile、Giuseppe Floresta、Vincenzo Patamia、Angelo Nicosia、Placido G. Mineo、Antonio Rescifina
DOI:10.1039/c9ob02352f
日期:——
green chemistry guidelines. The aim of our work is to use the hydrophobic cavity of cucurbit[7]uril (CB[7]) to mimic nature for performing different dehydration and cycloaddition reactions in water. The hydrophobic cavity of CB[7] made it possible to synthesize nitrones and isoxazolidines in a one-pot fashion using water as a reaction solvent. Substituted isoxazolidines were obtained from the cycloaddition
Tricarbonyl(benzaldehyde)chromium(0) complexes in organic synthesis: A highly stereoselective 1,3-dipolar cycloaddition of chromium(0)-complexed nitrones
作者:Chisato Mukai、Jea Cho Won、Jong Kim In、Miyoji Hanaoka
DOI:10.1016/s0040-4039(00)97200-9
日期:1990.1
The 1,3-dipolar cycloaddition of chromium(0)-complexed nitrones (10, 11) with electron-rich olefins (2) provided, after decomplexation with CAN, -3,5-disubstituted isoxazolidines (-14, 15) in a highly stereoselective as well as regioselective manner.
Treatment of isoxazolidine derivatives with methyl iodide, followed by simple heating with aqueous NaOH, gives rise to a competitive formation of alpha,beta-enones and tetahydro-1,3-oxazines. The ring-opening process is controlled by the stereochemistry of H-5 which represents the driving factor of two competitive reaction routes.
Mukai, Chisato; Kim, In Jong; Cho, Won Jea, Journal of the Chemical Society. Perkin transactions I, 1993, p. 2495 - 2504
作者:Mukai, Chisato、Kim, In Jong、Cho, Won Jea、Kido, Masaru、Hanaoka, Miyoji