Alkylation of Monosubstituted Malonate Anions With Pyridinium and Quinolinium Salts
作者:Alan R. Katritzky、Jose M. Aurrecoechea
DOI:10.1055/s-1987-27938
日期:——
Monosubstituted malonate anions are alkylated at room temperature with 1-(sec-alkyl)quinolinium salts. Hindered disubstituted malonate esters can thus be prepared under very mild conditions.
The c-alkylation of nitroalkame anions by l-substituted-2--butyl-4-phenyl- and -2,4-diphenyl-5,6-dihydrobenzo(ulbarh]quinolinium cations
作者:Alan R. Katritzky、M. Akram Kashmiri、Dieter K. Wittmann
DOI:10.1016/s0040-4020(01)91797-1
日期:1984.1
- The N-substituents are transferred from the title cations to the C-atom of nitroalkane anions in highyield at 25-80°C in DMSO solution. The title cations are readily available from the appropriate pyrylium cations and primary amines of types RCH2,NH2, and RR'CHNH2, allowing a general 2-step method for the preparation of higher nitro- alkanes. Spectral properties of a variety of nitroalkanes are
Kinetics and mechanisms of nucleophilic displacements with heterocycles as leaving groups. Part 6. Reactions of N-(substituted benzyl)azaheterocyclonium compounds with piperidine
作者:Alan R. Katritzky、Wlodzimierz H. Basinski、Yu Xiang Ou、Giuseppe Musumarra、Ranjan C. Patel
DOI:10.1039/p29820001055
日期:——
The preparation is described of series of N-(p-substituted)benzyl and N-(2-furfuryl) compounds with different heterocyclic leaving groups. First- and second-order rate constants for their reactions with piperidine in chlorobenzene are measured and discussed. Plots of k2 values for substituted compounds versus k2 for the parent N-benzyl derivative are linear for each substituent despite variable temperature
Katritzky, Alan R.; Lloyd, Jeremy M.; Patel, Ranjan C., Journal of the Chemical Society. Perkin transactions I, 1982, p. 117 - 124
作者:Katritzky, Alan R.、Lloyd, Jeremy M.、Patel, Ranjan C.
DOI:——
日期:——
Kinetics and mechanisms of nucleophilic displacements with heterocycles as leaving groups. 2. N-benzylpyridinium cations: rate variation with steric effects in the leaving group
作者:Alan R. Katritzky、Azzahra M. El-Mowafy、Giuseppe Musumarra、Kumars Sakizadeh、Choudhry Sana-Ullah、Sayed M. M. El-Shafie、Sukhpal S. Thind