Note on the Preparation of 1,2-Diketones from Acetylenes
作者:Regina Zibuck、Dieter Seebach
DOI:10.1002/hlca.19880710125
日期:1988.2.3
A mild method for the oxidation of acetylenes to 1,2-diketones using NaIO4/RuO2 is described. An investigation on the compatibility of various functional groups with this oxidizing agent is reported.
Selective reactions in polyethylene glycol. Hydrogenation of acetylenes by NaBH<sub>4</sub>–PdCl<sub>2</sub>in polyethylene glycol–methylene dichloride
The NaBH4–PdCl2–polyethylene glycol–CH2Cl2 system has been found to be effective for the hydrogenation of acetylenic triple bonds to the corresponding cis-alkenes.
The NaBH4-PdCl2-polyethylene glycol-CH2Cl2 system has been found to be effective for the hydrogenation of carbon-carbon triplebonds to the corresponding -alkenes.
Method of producing alpha, beta-unsaturated carboxylic acid compounds
申请人:Goto Fumisato
公开号:US20050277786A1
公开(公告)日:2005-12-15
There is disclosed a method of producing α,β-unsaturated carboxylic acid of formula (3)
wherein R
1
denotes a hydrogen atom, an alkyl group, an aryl group, an aralkyl group, an alkenyl group or an alkynyl group,
which method comprises reacting a carboxylic acid of formula (1)
wherein R
1
denotes the same as the above, or carboxylic anhydride of formula (2)
wherein R
1
denotes the same as the above, with a methylenating agent in a presence of a catalyst containing metal of Group 13 of the Periodic Table of Elements in the amount of not more than 5 weight %.
Asymmetric synthesis of 1-alkynylcyclopropane-1-carboxylates
作者:Huw M.L. Davies、Timothy A. Boebel
DOI:10.1016/s0040-4039(00)01453-2
日期:2000.10
Dirhodium tetrakis(S-(N-dodecylbenzenesulfonyl)prolinate)(Rh2S-DOSP4) catalyzed decomposition of methyl alkynyldiazoacetates in the presence of alkenes results in highly diastereoselective and enantioselective cyclopropanations. (C) 2000 Published by Elsevier Science Ltd.