Synthesis of β-Aminoenones via Cross-Coupling of In-Situ-Generated Isocyanides with 1,3-Dicarbonyl Compounds
作者:Xingxing Ma、Yao Zhou、Qiuling Song
DOI:10.1021/acs.orglett.8b01888
日期:2018.8.17
An efficient and practical strategy for the synthesis of β-aminoenones from a three-component reaction was developed. Ethyl bromodifluoroacetate serves as a C1 source in this strategy, forming isocyanides in situ with primary amines. This reaction represents the first example of utilization of readily available starting materials to generate isocyanides in situ and sequentially fully converted to β-aminoenones
A new preparation and some reactions of organocopper(I) isonitrile complexes
作者:Yoshihiko Ito、Toshiro Konoike、Takeo Saegusa
DOI:10.1016/s0022-328x(00)80312-5
日期:1975.2
A new preparation and somereactions of organocopper(I) isonitrile complexes are described. In the presence of isonitrile (RNC), some active hydrogen compounds (R'H) react smoothly with Cu2O and with metallic copper, evolving H2O and hydrogen, respectively, to produce organocopper(I) isonitrile complexes, R'Cu(RNC)2. The isonitrile insertion and the oxidative coupling by iodine of these complexes are
Factors affecting O, C and N acetylation of enamines of the type R1COCαHCβHNHR2
作者:Lech Kozerski
DOI:10.1016/0040-4020(76)80086-5
日期:1976.1
Acetylation of the title enamino ketones with acetylchloride was carried out in pyridine or ether with an without base. N-acetyl derivatives were obtained in pure ether, but activation of O and C nucleophilic centers was promoted by the presence of base. Electronic and structural factors governing regioselectivity of reaction are discussed.
Natural abundance 170 NMR spectra of 41 2,2-diacylenamines (enamino diketones and enamino diesters), recorded in acetonitrile solution, are reported. Tertiary enamino diketones show only one O-17 signal; primary and secondary derivatives show two O-17 signals. The shift difference (Delta delta(HB)) between the two carbonyl groups is mainly attributed to intramolecular hydrogen bonding and depends on the donor property of the amino group and the structure of the enamino diketone. The delta(O-17) values correlate well with the pK(a) values of amines. Correlations of delta(O-17-1) values for the chelated carbonyl group with their delta(C-13-1) and delta(C-13-2) values are observed. (C) 1997 by John Wiley & Sons, Ltd.