Structural effects in pyrazolidinone-mediated organocatalytic Diels–Alder reactions
作者:Eoin Gould、Tomas Lebl、Alexandra M.Z. Slawin、Mark Reid、Andrew D. Smith
DOI:10.1016/j.tet.2010.09.021
日期:2010.11
promoted Diels–Alderreactions evaluated. Systematic variation of the C(5)- and N(2)-substituents indicates that the incorporation of an electron withdrawing substitutent at N(2) and either a Ph or CF3 substitution at C(5) results in optimal catalytic activity. The diastereoisomeric resolution of a model C(5)-Ph substituted pyrazolidinone and its ability to impart modest levels of asymmetric induction
Development of Scalable Processes for the Preparation of <i>N</i>-Methyl-3-Bromo-5-Methyl Pyrazole
作者:Richard J. Fox、Chester E. Markwalter、Michael Lawler、Keming Zhu、Jacob Albrecht、Joseph Payack、Martin D. Eastgate
DOI:10.1021/acs.oprd.7b00091
日期:2017.5.19
The development and optimization of two scalable routes to N-methyl-3-bromo-5-methyl pyrazole is described. The initial Sandmeyer route entailed a three-step sequence from crotonitrile and methyl hydrazine, proceeding through the 3-amino pyrazole intermediate. Due to the GTI liability of the 3-amino pyrazole intermediate, a tedious steam-distillation, and <30% overall yield, we developed a second-generation
Synthesis, Bioactivity Evaluation,
<scp>3D‐QSAR</scp>
, and Molecular Docking of Novel Pyrazole‐4‐carbohydrazides as Potential Fungicides Targeting Succinate Dehydrogenase
作者:Jian Jiao、Min Chen、Shengxin Sun、Weijie Si、Xiaobin Wang、Weijie Ding、Xincan Fu、An Wang、Chunlong Yang
DOI:10.1002/cjoc.202000438
日期:2021.2
To screen novel antifungal agents targeting the succinatedehydrogenase (SDH), a series of pyrazole‐4‐carbohydrazides were rationally designed, synthesized, and characterized under the guidance of the structures of succinatedehydrogenase inhibitors (SDHIs). Bioassay results in vitro indicated that most of the target compounds exhibited excellent activity against Rhizoctonia solani (R. solani), Fusarium