Bis(pyridine)iodonium Tetrafluoroborate (IPy2BF4): A Versatile Oxidizing Reagent
作者:José Barluenga、Francisco González-Bobes、Marcelo C. Murguía、Sreenivasa R. Ananthoju、José M. González
DOI:10.1002/chem.200400136
日期:2004.9.6
The use of bis(pyridine)iodoniumtetrafluoroborate (IPy(2)BF(4)) as an oxidizing agent towards different types of alcohols is reported. The observed reactivity involves different reaction pathways, as a function both of the structures of the starting materials and of the experimental conditions. Interestingly, the title iodine-containing compound is capable of a tuneable reaction with simple cycloalkanols
Lithiation of Alkoxyalkyl Phenyl Sulfones. New Approach to Acyl Anion Synthesis
作者:Kazuhiko Tanaka、Syuichi Matsui、Aritsune Kaji
DOI:10.1246/bcsj.53.3619
日期:1980.12
l and 1-(1-ethoxyethoxy)ethyl phenyl sulfones undergo metalation with LDA in THF in the presence of HMPA. The resulting lithium salts were easily alkylated with various alkyl halides and hydrolyzed under mild conditions to give the corresponding carbonyl compounds. The new synthetic method for the preparation of aldehydes and ketones employing these carbanions has been developed.
In the presence of phenylsilane and a catalytic amount of indium(III) acetate, organic iodides added to electron-deficientalkenes in ethanol at room temperature. Both simple and functionalized organic iodides were applicable to this reaction. A plausible reaction mechanism involves the formation of indium hydride species by hydride transfer from silicon to indium and an indium hydride-mediated radical
Photolysis of 1-Alkylcycloalkanols in the Presence of (Diacetoxyiodo)benzene and I<sub>2</sub>. Intramolecular Selectivity in the β-Scission Reactions of the Intermediate 1-Alkylcycloalkoxyl Radicals
作者:Carla S. Aureliano Antunes、Massimo Bietti、Osvaldo Lanzalunga、Michela Salamone
DOI:10.1021/jo049524y
日期:2004.8.1
and 1-phenylcyclooctoxyl radicals, formation of products deriving from an intramolecular 1,5-hydrogen atom abstraction reaction from the cycloalkane ring has also been observed. The results are discussed in terms of release of ring strain associated to ring opening, stability of the alkyl radical formed by C-alkyl cleavage, and with cycloheptoxyl and cyclooctoxyl radicals, also in terms of the possibility
Synthesis and structure–activity relationships of a new class of selective EP 3 receptor agonist, 13,14-didehydro-16-phenoxy analogues of prostaglandin E 1
A series of 13,14-didehydro-16-phenoxy analogues of prostaglandin E1 was synthesized and their agonistic activity on EP receptor subtypes was evaluated. 13,14-Didehydro-16-phenoxy-1-decarboxy analogues, 7e and 7f, display highly selective activity on the EP3 receptor subtype, thus, their utility as a selective anti-ulcer agent can be expected.