Kinetics and mechanisms of nucleophilic displacements with heterocycles as leaving groups. Part 9. N-substituted 2,4,6-triphenylpyridiniums, 5,6-dihydro-2,4-diphenylbenzo[h]quinoliniums, and 5,6,8,9-tetrahydro-7-phenyldibenzo[c,h]acridiniums: kinetic rate variation with structure of the N-substituent
作者:Alan R. Katritzky、Kumars Sakizadeh、Yu Xiang Ou、Bratislav Jovanovic、Giuseppe Musumarra、Francesco P. Ballistreri、Roberto Crupi
DOI:10.1039/p29830001427
日期:——
order benzyl > methyl ≃ s-alkyl > continuous chain primary alkyl ≃ neopentyl. Comparisons with literature data involving other leavinggroups, standardized by reference to the ethyl compound in each series, again show that groups larger than ethyl tend to react faster in series (1), (2), and especially (3) than expected, and methyl tends to react more slowly. Similar but smaller trends are found in literature