Halocyclization of Unsaturated Guanidines Mediated by Koser’s Reagent and Lithium Halides
作者:Marion Daniel、Florent Blanchard、Sophie Nocquet-Thibault、Kevin Cariou、Robert H. Dodd
DOI:10.1021/acs.joc.5b01750
日期:2015.11.6
The synthesis of halogenated cyclic guanidines through iodine(III)-mediated umpolung of halidesalts is described. Cyclic guanidines of various sizes can be obtained with generally excellent regioselectivities through either a chloro- or a bromocyclization, using Koser’s reagent and the corresponding lithium salt.
Intramolecular epoxide ring opening cyclisation reactions involving guanidines
作者:Zainab Al Shuhaib、Marcel Arndt、Mark Dennis、Daniel M. Evans、Iestyn Jones、Vera Leitmann、Patrick J. Murphy、Dion Roberts、Richard Rowles、Yones K. Sadaghiani、Andrew J. Thornhill、Robert J. Nash、Jackie Hollinshead、Barbara Bartholomew、Graham J. Tizzard、Simon J. Coles
DOI:10.1016/j.tet.2016.12.065
日期:2017.2
The cyclisation of N-allyl- and N-homoallylguanidines using DMDO leading to the formation of novel 5- and 6-membered guanidine heterocycles is reported. Several of the products formed displayed weak inhibition of glycosidase enzymes.
作者:Christiane Albrecht、Sarah Barnes、Henning Böckemeier、Deiniol Davies、Mark Dennis、Daniel M. Evans、Matthew D. Fletcher、Iestyn Jones、Vera Leitmann、Patrick J. Murphy、Richard Rowles、Robert Nash、Richard A. Stephenson、Peter N. Horton、Michael B. Hursthouse
DOI:10.1016/j.tetlet.2007.10.143
日期:2008.1
The cyclisation of N-allyl- and N-homoallylguanidines using DMDO or I-2/K2CO2 leading to novel heterocycles is reported. (c) 2007 Published by Elsevier Ltd.
Iodocyclisations reactions of Boc- and Cbz-protected N-allylguanidines
作者:Zainab Al Shuhaib、Deiniol H. Davies、Mark Dennis、Daniel M. Evans、Matthew D. Fletcher、Herjan Franken、Paul Hancock、Jackie Hollinshead、Iestyn Jones、Kristina Kähm、Patrick J. Murphy、Robert Nash、David Potter、Richard Rowles
DOI:10.1016/j.tet.2014.03.087
日期:2014.7
Iodocyclisation and rearrangement reactions of mono-protected allyl substituted guanidines
作者:Deiniol Davies、Matthew D. Fletcher、Herjan Franken、Jackie Hollinshead、Kristina Kähm、Patrick J. Murphy、Robert Nash、David M Potter
DOI:10.1016/j.tetlet.2010.10.050
日期:2010.12
The iodocyclisation of a range N-allyl and N-homoallylguanidines using I2/K2CO3 has been found to lead to a series of novel heterocycles which undergo selective rearrangements on variation of the reaction conditions, and predictable protecting group migration in the presence of trifluoroacetic acid in methanol.
已经发现,使用I 2 / K 2 CO 3对一系列N-烯丙基和N-高烯丙基胍的碘环化可导致一系列新的杂环,这些杂环在反应条件变化时发生选择性重排,并且在存在下可预测的保护基团迁移三氟乙酸的甲醇溶液。