开发了在亚磷酸二乙酯存在下吡啶鎓盐和三甲基硅烷基氰化物 (TMSCN) 的铜催化反应。该反应首次实现了从容易获得的起始材料一步构建生物学上重要的2-氰基咪唑并[1,2- a ]吡啶的反应,并且在克级是可行的。该协议的范围通过 27 个示例进行了演示。在这一一锅法中可以实现连续的双氰化和环化。TMSCN 发挥双重作用,不仅作为“CN”源,而且作为咪唑并[1,2- a ]吡啶环化的偶联伙伴。
Solvent reorganisation as the driving force for rate changes of Menschutkin reactions in an ionic liquid
作者:Hon Man Yau、Andrew G. Howe、James M. Hook、Anna K. Croft、Jason B. Harper
DOI:10.1039/b909171h
日期:——
The effect on the rate of reaction of each of a series of Menschutkin processes on changing from a molecular solvent to an ionic liquid was investigated. In each case, the rate acceleration observed at room temperature could be attributed to the change in the entropy of the system on reaching the transition state, offsetting any enthalpic cost.
<sup>79</sup>Br NMR spectroscopy as a practical tool for kinetic analysis
作者:Si Jia Chan、Andrew G. Howe、James M. Hook、Jason B. Harper
DOI:10.1002/mrc.2401
日期:2009.4
(79)Br NMRspectroscopy has been used to monitor a series of reactions in which the bromide ion is produced, including the Menschutkin reaction of pyridine with a range of substituted benzyl bromides and a Heck coupling process. In cases where the process could also be monitored using (1)H NMRspectroscopy, the kinetic analyses using heteronuclear magnetic resonance spectroscopy were shown to be completely
Iodine-Mediated Heterocyclization for the Synthesis of 6-Alkylthio-1,3,5-triazine-2,4-diamines from <i>N</i>-Alkylpyridinium Salts and NH<sub>4</sub>SCN
作者:Zhiqi Liu、Yinghua Li、Weibin Fan、Deguang Huang
DOI:10.1021/acs.joc.3c02517
日期:2024.1.5
An iodine-mediated method for the synthesis of 6-alkylthio-1,3,5-triazine-2,4-diamines by the reaction of N-alkylpyridinium salts and NH4SCN in air is reported. Twenty-seven compounds were obtained under the standard conditions. Pyridinium salts work as benzyl-group transfer reagents to promote the formation of the CBn–SSCN bond and thereby the construction of the triazine skeleton. A plausible mechanism
报道了一种通过N-烷基吡啶鎓盐与NH 4 SCN在空气中反应合成6-烷硫基-1,3,5-三嗪-2,4-二胺的碘介导方法。在标准条件下获得了27种化合物。吡啶盐作为苄基转移试剂,促进 C Bn –S SCN键的形成,从而构建三嗪骨架。根据实验结果和文献调查,提出了一种合理的机制。
Kroehnke et al., Justus Liebigs Annalen der Chemie, 1956, vol. 600, p. 176,188
作者:Kroehnke et al.
DOI:——
日期:——
Shpan'ko, I. V.; Korostylev, A. P.; Rusu, L. N., Journal of Organic Chemistry USSR (English Translation), 1984, vol. 20, p. 1715 - 1723