Structure–activity relationship of anti-malarial spongean peroxides having a 3-methoxy-1,2-dioxane structure
摘要:
In order to study the structure-activity relationship of anti-malarial spongean peroxides, several analogues concerning with the 6-methoxyacetyl moiety and the 3-pentyl residue in methyl 2-(3-methoxy-3-pentyl-1,2-dioxan-6-yl) acetate were synthesized and evaluated for anti-malarial activity. The tert-butyl ester analogue 14 showed stability in mouse serum and a high selectivity index against the malaria parasite, Plasmodium falciparum, and the citronellyl analogue 31 exhibited the strongest in vitro antimalarial activity among them, and the imidazole analogue 25 showed desirable in vivo anti-malarial activity against P. berghei infected mice. (C) 2004 Elsevier Ltd. All rights reserved.
Switching between Novel Samarium(II)-Mediated Cyclizations by a Simple Change in Alcohol Cosolvent
作者:Thomas K. Hutton、Kenneth W. Muir、David J. Procter
DOI:10.1021/ol0358399
日期:2003.12.1
undergo two very different stereoselective cyclization reactionsmediated by samarium(II) iodide depending upon the alcohol cosolvent used in the reaction. Switching between an unprecedented aldol spirocyclization and a novel cyclobutanol-forming process can be achieved simply by changing the alcohol cosolvent from methanol to tert-butyl alcohol. [reaction: see text]
Pd(0)-Catalyzed Conjugate Addition of Benzylzinc Chlorides to α,β-Enones in an Atmosphere of Carbon Monoxide: Preparation of 1,4-Diketones
作者:Motoki Yuguchi、Masao Tokuda、Kazuhiko Orito
DOI:10.1021/jo035468+
日期:2004.2.1
Pd(0)-catalyzed conjugate addition of benzylzinc chloride to methyl vinyl ketone in the presence of chlorotrimethylsilane and lithium chloride in an atmosphere of carbon monoxide at room temperature afforded 1-phenyl-2,5-hexanedione monosilyl enol ether. In this catalytic carbonylation, four components are connected in one reaction. Successive acidic workup generated a variety of 1,4-diketones from
The first formyl radical generation from α-chloro N-methoxyphthalimides is reported, enabling selective aldehyde synthesis by alkene hydroformylation under mild photoredox conditions. Experimental and computational approaches establish the concerted hydrochloride elimination for the formyl radical generation from α-chloro methoxy radicals.
Synthesis of 1,4-ketoaldehydes and 1,4-diketones by Mo-catalyzed oxidative cleavage of cyclobutane-1,2-diols
作者:Sara Gómez-Gil、Rubén Rubio-Presa、Raquel Hernández-Ruiz、Samuel Suárez-Pantiga、María R. Pedrosa、Roberto Sanz
DOI:10.1039/d3ob00436h
日期:——
A new two-step procedure for the synthesis of 1,4-dicarbonyls has been developed involving an efficient and clean Mo-catalyzed oxidativecleavage of cyclobutane-1,2-diols with DMSO, which is used as solvent and oxidant. The required starting glycols were prepared by nucleophilic additions of organolithiums and Grignard reagents to easily available 2-hydroxycyclobutanones.
已经开发了一种用于合成 1,4-二羰基化合物的新两步法,涉及使用用作溶剂和氧化剂的 DMSO 对环丁烷-1,2-二醇进行有效且清洁的 Mo 催化氧化裂解。所需的起始乙二醇是通过有机锂和格氏试剂对容易获得的 2-羟基环丁酮进行亲核加成而制备的。
Brown,E.; Paterne,M., Bulletin de la Societe Chimique de France, 1974, p. 1001 - 1004