No abstract

1,4-Addition of arylboronic acids to α,β-unsaturated ketones was smoothly catalyzed by palladium(0) phosphine complexes with chloroform in the presence of base. It is remarked that the palladium(0) complexes have no catalytic activity in the absence of chloroform. The reaction proceeded without β-hydride elimination.

Addition reactions O 0060Palladium-Catalyzed Conjugate 1,4-Addition of Organoboronic Acids to α,β-Unsaturated Ketones. -Remarkably, the title reaction is not catalyzed by Pd (0) complexes in the absence of chloroform. It proceeds without β-hydride elimination. -(YAMAMOTO, T.; IIZUKA, M.; OHTA*, T.; ITO, Y.; Chem. Lett. 35 (2006) 2, 198-199; Dep. Mol. Sci. Technol., Fac. Eng., Doshisha Univ., Tanabe, Kyoto 610-03, Japan; Eng.) -M. Paetzel 28-027

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