The Quarternisation of Tertiary Amines with Dihalomethane
作者:B. Almarzoqi、A.V. George、N.S. Isaacs
DOI:10.1016/s0040-4020(01)87459-7
日期:1986.1
Lermontow, Chemische Berichte, 1874, vol. 7, p. 1255
作者:Lermontow
DOI:——
日期:——
ALMARZOQI, B.;GEORGE, A. V.;ISAACS, N. S., TETRAHEDRON, 1986, 42, N 2, 601-607
作者:ALMARZOQI, B.、GEORGE, A. V.、ISAACS, N. S.
DOI:——
日期:——
Synthesis of Bridgehead Nitrogen Heterocycles via Cyclization of α-Ammonio 5-Hexenyl Radicals
作者:Ernest W. Della、Paul A. Smith
DOI:10.1021/jo9813538
日期:1999.3.1
bicyclic salts so obtained unexpectedly leads to rupture of one of the rings rather than loss of the N-methyl group. The 1-azabicyclo[2.2.1]heptane could be accessed readily via tin hydride-induced cyclization of the corresponding N-phenylethylammonium salt 54, followed by Hofmann elimination with potassium tert-butoxide.
Kinetic evidence for a novel, Grob-like substitution/fragmentation mechanism for the reaction of nucleophiles with trialkylammoniomethyl halides
作者:Michelle O. Fletcher、Li Zhang、Quyen Vu、William R. Dolbier, Jr.
DOI:10.1039/a900218i
日期:——
bimolecular mechanism for the unusual nucleophilic substitution/fragmentation reactions of iodide ion with (halomethyl)trimethylammonium salts. The relative reactivities of allyl, ethyl and methyl groups for this Grob-like reaction are also determined. Activation parameters are presented for the thermal reactions of 1-iodo-N,N,N-trimethylmethaniminium iodide (log A = 8.7, Ea = 19.0 kcal mol–1) and
动力学证据表明,碘离子与(卤甲基)三甲基铵盐发生不寻常的亲核取代/断裂反应的是一种协同的双分子机理。还确定了该Grob-样反应的烯丙基,乙基和甲基的相对反应性。激活参数被呈现为1-碘的热反应Ñ,Ñ,Ñ -trimethylmethaniminium碘(登录甲 = 8.7,Ë一个 = 19.0千卡摩尔-1)和1-碘- Ñ -allyl- Ñ,Ñ -dimethylmethaniminium碘化物(log A = 14.6,E a在乙腈中 为25.7 kcal mol –1),后者在70°C时观察到的二级速率常数比前者大39倍。将结果与休斯,英戈尔德和科南特的烷基卤的S N 2反应的经典数据进行比较。