Trends in alkyl substituent effects on nucleophilic reactions of carbonyl compounds: Gas phase reactions between ammonia and R1R2COCH3+ oxonium ionsElectronic supplementary information (ESI) available: proton affinities, geometries and energies of optimised structures, structures of the stationary points and a plot of experimental and RRKM ln(kae/ksub) against a-stabilisation constants. See http://www.rsc.org/suppdata/ob/b2/b209955c/
作者:Lihn Bache-Andreassen、Einar Uggerud
DOI:10.1039/b209955c
日期:2003.2.11
The reactivity of carbonyl substituted methyl oxonium ions (R1R2COCH3+) towards ammonia has been investigated using an FT-ICR mass spectrometer and ab initio calculations. The monosubstituted ions (R1 = H; R2 = H, CH3, C2H5 and i-C3H7) show different reaction patterns with variable degree of: (1) nucleophilic substitution, (2) addition-elimination and (3) proton transfer, when reacted with ammonia
Akhmatdinov, R. T.; Kantor, E. A.; Karakhanov, R. A., Journal of Organic Chemistry USSR (English Translation), 1981, vol. 17, # 3, p. 400 - 403
作者:Akhmatdinov, R. T.、Kantor, E. A.、Karakhanov, R. A.、Rakhmankulov, D. L.
DOI:——
日期:——
Allylic Acetals as Acrolein Oxonium Precursors in Tandem C−H Allylation and [3+2] Dipolar Cycloaddition
作者:Heeyoung Lee、Dahye Kang、Sang Hoon Han、Rina Chun、Ashok Kumar Pandey、Neeraj Kumar Mishra、Sungwoo Hong、In Su Kim
DOI:10.1002/anie.201903983
日期:2019.7.8
The ruthenium(II)‐catalyzedC−Hfunctionalization of (hetero)aryl azomethine imines with allylic acetals is described. The initial formation of allylidene(methyl)oxoniums from allylic acetals could trigger C(sp2)−H allylation, and subsequent endo‐type [3+2] dipolar cycloaddition of polar azomethine fragments to deliver valuable indenopyrazolopyrazolones. The utility of this method is showcased by the