Metal-catalyzed coupling reactions on an olefin template: the total synthesis of Bupleurynol
摘要:
The naturally occurring polyacetylene Bupleurynol was synthesized in a convergent and stereospecific manner using a series of metal-mediated cross-coupling reactions. The synthesis demonstrates the utility of using a di-functional olefin template for the stereospecific synthesis of a disubstituted alkene product and its elaboration to a natural product target. (C) 2003 Elsevier Ltd. All rights reserved.
A new facile synthesis of 2-substituted 1,3-butadiene derivatives via palladium-catalyzed cross-coupling reaction of 2,3-alkadienyl carbonates with organoboron compounds
A synthesis of 2-aryl-, 2-(1-alkenyl)-, and 2-alkyl-1,3-butadiene derivatives (2) by the palladium-catalyzed cross-coupling reaction of 2,3-butadienyl carbonates (1) with 9-alkyl-9-bicyclo[3.3.1]nonanes (9-alkyl-9-BBN), 1-alkenylboronic acids, or arylboronic acids is described. The reaction proceeded regioselectively with the palladium-phosphine complexes under neutral conditions.
Novel diastereoselective synthesis of (E)- and (Z)-allylsilanes via organoboranes
作者:Narayan G. Bhat、Wendy C. Lai、Matthew B. Carroll
DOI:10.1016/j.tetlet.2007.04.052
日期:2007.6
A simple, novel diastereoselective synthesis of both (E)- and (Z)-allylsilanes via organoboranes is developed. (E)-1-Alkenylboronate esters easily prepared from the corresponding terminal alkynes viahydroboration with dibromoborane-methyl sulfide complex followed by treatment with 1,3-propane diol readily react with trimethylsilylmethyllithium at −78 °C in methanol followed by reaction with iodine
Metal-Catalyzed Coupling Reactions on an Olefin Template: The Total Synthesis of (13<i>E</i>,15<i>E</i>,18<i>Z</i>,20<i>Z</i>)-1-Hydroxypentacosa- 13,15,18,20-tetraen-11-yn-4-one 1-Acetate
作者:Michael G. Organ、Haleh Ghasemi
DOI:10.1021/jo035376k
日期:2004.2.1
The naturally occurring ant venom (13E,15E,18Z,20Z)-1-hydroxypentacosa-13,15,18,20-tetraen-11-yn-4-one 1-acetate was synthesized stereospecifically using a series of metal-mediated cross-coupling reactions. The use of the difunctional olefin template (E)-1-chloro-2-iodoethylene as the central, pseudosymmetrical building block facilitated a fully convergent and, thus, efficient strategy to prepare this polyunsaturated natural product.
Moriya Tsukasa, Furuuchi Toshinari, Miyaura Norio, Tetrahedron, 50 (1994) N 27, S 7961-7968