Organometallic-type reactions in aqueous media mediated by indium. Allylation of acyloyl-imidazoles and pyrazoles. Regioselective synthesis of β,γ-unsaturated ketones
作者:Vernal J. Bryan、Tak-Hang Chan
DOI:10.1016/s0040-4039(97)01512-8
日期:1997.9
Indiummediated coupling of allylic bromide with acyloyl-imidazoles or pyrazoles in aqueousmedia gives the corresponding tertiary alcohols or ketones in good yield. The reaction provides a facile regioselective synthesis of β,γ-unsaturated ketones and its usefulness is demonstrated by the synthesis of the monoterpene artemesia ketone.
Additions of organometallics to enethiolizable β-oxodithioesters - potential synthetic uses.
作者:Serge Masson、André Thuillier
DOI:10.1016/s0040-4039(00)88354-9
日期:1982.1
Enethiolizable β-oxidithioesters allowing the succesive formation of carboncarbon bonds at the carbonyl and at the thiocarbonyl sites, are precursors of α-unsaturated dithioesters and can be used as a3d1 or a3a1 synthons.
允许在羰基和硫代羰基位置成功形成碳碳键的可乙氧基化的β-氧化硫代酯是α-不饱和二硫代酯的前体,可以用作3 d 1或3 a 1合成子。
Nuclear synthons: mesyltriflone as an olefin polyanion equivalent
作者:James B. Hendrickson、Gerald J. Boudreaux、Paul S. Palumbo
DOI:10.1021/ja00269a037
日期:1986.4
then of Ramberg-Backlund elimination to a substituted olefin. The alkylations are clean and regiospecific, often amenable to one-pot operation, and in most cases the elimination is smooth. A variety of examples is presented to establish the scope of the method, and the mechanism and stereochemistry are discussed. Nuclear Synthons. In our examination of the logic of synthesis design* we directed attention
Synthesis of allylic ketones via acylation of allylic mercurials
作者:Richard C. Larock、Yong-de Lu
DOI:10.1016/s0040-4039(00)82448-x
日期:——
Allylic mercurials, readily available from allylic halides and mercury(O), react with acyl chlorides and AlCl3 under mild reaction conditions to afford high yields of allylic ketones.
General Synthesis of Ketones from Carboxylic Esters and Carboxamides by Use of Mixed Organolithium-Magnesium Reagents: Syntheses of Artemisia Ketone
作者:Charles Fehr、Jos� Galindo、Roland Perret
DOI:10.1002/hlca.19870700710
日期:1987.11.4
The novel reagents formed by combination of Grignardreagents (RMgX) with lithium diisopropylamide (LDA) convert non-enolizable or slowly enolizable carboxylicesters or caboxamides into ketones which are protected from further reaction by their in situ conversion into enolates. These enolates can be trapped with electrophiles such as Me3SiCl and allyl bromide. The scope of this Grignard mono-addition