Green and Practical Synthesis of Thioenamines and Chromones via Iodine-Catalyzed Cross-Dehydrogenation Coupling Reaction
作者:Yue-Xiao Wu、Shi-Ya Wu、Zhi-Bing Dong
DOI:10.1021/acs.joc.2c01924
日期:2022.11.18
An iodine-catalyzed one-pot synthesis of thioenamines and chromones is reported. By using easily available phenyl isothiocyanate, alcohols, and enamines as starting materials, a tandem reaction (nucleophilic addition and the subsequent cross-dehydrogenation coupling) proceeded smoothly to give the desired thioenamines in good to excellent yields. This protocol features simple operation, mild conditions
Interesting presentation of a retained upper deciduous incisor with apical fenestration
作者:M. Edney
DOI:10.1038/sj.bdj.4800483a
日期:2000.4.8
A case is described where intrusion of a primary incisor resulting in apical fenestration may have occurred secondary to occlusal forces. The effects on the permanent dentition and possible aetiological factors are discussed.
Ortho Esters, Imidic Esters and Amidines. VI. Two General Methods of Synthesis of N-Phenylformimidic Esters Involving Transesterification<sup>1,2</sup>
作者:Royston M. Roberts、Thomas D. Higgins、Paul R. Noyes
DOI:10.1021/ja01619a036
日期:1955.7
Comstock; Clapp, American Chemical Journal, 1891, vol. 13, p. 528
作者:Comstock、Clapp
DOI:——
日期:——
Farrow; Ingold, Journal of the Chemical Society, 1924, vol. 125, p. 2548