fission proceeds via a proton-switch mechanism T0→ T±. At pH > 11 the only product produced is the hydroxycarbamate (C–O fission)via its anionic intermediate T–. Mono- and gemdimethyl substituted iminocarbonates T– undergo two modes of ring-opening. Employing MNDO/H calculations the relative stability (ΔHF) of the intermediates and their formed products was predicted and correlated with actual experimental
Intramolecularity of the Thermal Rearrangement of Allyloxytetrazoles to N-Allyltetrazolones†
作者:M. Lurdes S. Cristiano、Robert A. W. Johnstone
DOI:10.1039/a608333a
日期:——
The intramolecularity of the thermalrearrangement of 1-aryl-5-allyloxy-1H-tetrazoles 1 to 1-aryl-4-allyl-1,4-dihydrotetrazol-5-ones 2 has been investigated through cross-over studies: the results support the hypothesis for a concerted sigmatropic rearrangement occurring through a highly polar transition state, in which a partially positively charged allyl group migrates from oxygen to nitrogen, without
Exploring a Tetrahydroquinoline Antimalarial Hit from the Medicines for Malaria Pathogen Box and Identification of its Mode of Resistance as
<i>Pf</i>
eEF2
作者:Benoît Laleu、Kelly Rubiano、Tomas Yeo、Irene Hallyburton、Mark Anderson、Benigno Crespo‐Fernandez、Francisco‐Javier Gamo、Yevgeniya Antonova‐Koch、Pamela Orjuela‐Sanchez、Sergio Wittlin、Gouranga P. Jana、Bikash C. Maity、Elodie Chenu、James Duffy、Peter Sjö、David Waterson、Elizabeth Winzeler、Eric Guantai、David A. Fidock、Thomas G. Hansson
DOI:10.1002/cmdc.202200393
日期:2022.11.18
report an exploration of the antimalarial compound MMV692140. The mode of resistance was identified as PfeEF2. The structural motif was explored in a chemistry program, resulting in the identification of MMV1919557, an analog with significantly improved antimalarial potency. This new series could provide a tool to further understand the potential of PfeEF2 as a target for malaria treatment.
Kuehle,E., Angewandte Chemie, 1962, vol. 74, p. 861 - 866
作者:Kuehle,E.
DOI:——
日期:——
Improved Preparation of 5-Chloro-1-phenyl-1<i>H</i>-tetrazole and Other 5-Chlorotetrazoles.
作者:José A. C. Alves、Robert A. W. Johnstone
DOI:10.1080/00397919708004134
日期:1997.8
Reaction of aryldichloroisocyanides 1a-e with sodium azide and a phase transfer agent has provided 5-chloro-1-aryl-1H-tetrazoles 2a-e in good yield. In particular, the widely-used intermediate, 5-chloro-1-phenyl-1H-tetrazole 2a, can be produced conveniently and safely in yields approaching 100%.