Synthèse par réaction sRN1 de nouveaux dérivés en série imidazo[1,2-α]pyridine à potentialités pharmacologiques
作者:Patrice Vanelli、Nacer Madadi、Christine Roubaud、José Maldonado、Michel P. Crozet
DOI:10.1016/s0040-4020(01)87129-5
日期:1991.1
The study of SRN1 reaction between 2-chloromethyl-3-nitroimidazo[1,2-a] pyridine and 2-nitropropane salts has been extended to various aliphatic, cyclic and heterocyclic nitronate anions. From C-alkylation products, base-promoted nitrous acid elimination afforded new potential pharmacological derivatives with a trisubstituted double bond at the 2 position.
Iridium-Catalyzed Enantioselective Allylic Substitutions with Aliphatic Nitro Compounds as Prenucleophiles
作者:Günter Helmchen、Axel Dahnz
DOI:10.1055/s-2006-933121
日期:——
Enantioselective Ir-catalyzed allylic alkylations with ni- troalkanes and ethyl nitroacetate as nucleophiles are reported. Up to 99% ee was achieved using catalysts prepared by in situ activation of mixtures of phosphorus amidites and (Ir(COD)Cl)2. The method was applied to a synthesis of the antidepressant (1S,2R)-trans-2- phenylcyclopentanamine.
报道了以硝基烷烃和硝基乙酸乙酯为亲核试剂的对映选择性 Ir 催化烯丙基烷基化反应。使用通过原位活化磷亚胺和 (Ir(COD)Cl)2 的混合物制备的催化剂,实现了高达 99% 的 ee。该方法应用于抗抑郁药(1S,2R)-反式-2-苯基环戊胺的合成。
Synthèse par réactions SRN1 de nouveaux 5-nitroimidazoles antiparasitaires et antibactériens
作者:P Vanelle、MP Crozet、J Maldonado、M Barreau
DOI:10.1016/0223-5234(91)90026-j
日期:1991.3
1-Methyl-2-chloromethyl-5-nitroimidazole reacts by an S(RN)1 mechanism with various aliphatic, cyclic or heterocyclic nitronate anions to afford, in high yields, new 5-nitroimidazoles bearing a trisubstituted ethylenic double bond at the 2 position. Some of these compounds are as active as metronidazole in vitro and in vivo against protozoa and anaerobic bacteria. Structure-activity relationships are discussed.