Palladium-Catalyzed Cross-Coupling of 3-Iodobut-3-enoic Acid with Organometallic Reagents. Synthesis of 3-Substituted But-3-enoic Acids
摘要:
3-Substituted but-3-enoic acids were obtained in good yields under mild experimental conditions by palladium-catalyzed cross-coupling of 3-iodobut-3-enoic acid with organozinc or organotin compounds using PdCl2(MeCN)(2) as catalyst and DMF as solvent.
Stereospecific synthesis of (Z) or (E)-3-methylalk-2-enoic acids
作者:Mohamed Abarbri、Jean-Luc Parrain、Alain Duchêne
DOI:10.1016/0040-4039(95)00285-k
日期:1995.4
The palladiumcatalysed coupling of organozinc or organotin reagents with 3-iodobut-2(or 3)-enoic acid is stereoselective and affords Z(or E)-3-methylalk-2-enoic acids. The method was applied to the synthesis of the E and Z stereoisomers of ocimenones and pseudo-tagetones.
Palladium-Catalyzed Highly Chemo<i>-</i> and Regioselective Formal [2 + 2 + 2] Sequential Cycloaddition of Alkynes: A Renaissance of the Well Known Trimerization Reaction?
regioselective formation of the benzene ring by a palladium-catalyzed formal [2 + 2 + 2] sequential intermolecular trimerization of alkynes is proposed. Homodimerization of terminal alkynes and subsequent [4 + 2] benzannulation with diynes gives tetrasubstituted benzenes in moderate to good yields. The introduction of two different alkynes (terminal and internal) in the first step of the sequence allows for
The stereoselective synthesis of vinylstannanes bearing car☐ylic acid function was achieved from acetylenic acids via stannylcupration reaction. In homoallylic series, regioselectivities are highly dependant on the nature of stannylanionids and on the protection of the car☐ylic acid function.
Efficient Synthesis of 4-Halo-4-penten-2-ones and 3-Halo-3-butenoic Acids/Esters via Hydrohalogenation Reaction of 3,4-Pentadien-2-one and 2,3-Butadienoic Acid/Methyl Ester
作者:Shengming Ma、Zhangjie Shi、Lintao Li
DOI:10.1021/jo980129f
日期:1998.6.1
Abarbri Mohamed, Parrain Jean-Luc, Duchene Alain, Tetrahedron Lett., 36 (1995) N 14, S 2469-2472