basis of a study of the O-phenylation of 3-phenyl-2-propyn-1-ol with diphenyliodonium triflate and t-BuONa, a variety of 4-aryl-3-iodo-2H-benzopyrans were prepared in good to moderate yields in one pot from the reaction of 3-aryl-2-propyn-1-ols with diaryliodonium triflates and t-BuONa, followed by the treatment with N-iodosuccinimide and BF3·OEt2, under transition-metal-free and mild conditions. The formed
Copper-catalyzed cross-coupling of (Z)-allyl phenyl ethers with Grignard compounds in the synthesis of insect pheromones
作者:E. A. Petrushkina、V. N. Kalinin
DOI:10.1134/s1070363208100125
日期:2008.10
(8Z)-Dodec-8-en-1-yl acetate (pheromone of oriental fruit moth Grapholita molesta) and (9Z)-dodec-9-en-1-yl acetate (pheromone of grape berry moth Paralobesia viteana) containing impurities of isomeric structures were synthesized via copper-catalyzed cross-coupling of (Z)-1-phenoxyhex-2-ene and (Z)-1-phenoxypent-2-ene, respectively, with Grignard compounds in the key stage.
Synthesis of Novel 3-Bromo-2H-chromene Derivatives: Palladium-Mediated Intramolecular Cyclization of Aryl Propargyl Ethers
作者:Paramasivan Perumal、Gurunathan Savitha、Kulandhai Felix
DOI:10.1055/s-0029-1217563
日期:2009.8
presence of catalytic amount of Pd(OAc) 2 in conjunction with stoichiometric amount of CuBr 2 and LiBr to the corresponding 3-bromo-2H-chromene derivatives in good yields. The protocol was further extended to synthesize 3-bromo-benzofused 2H-chromene derivatives.