Pd(<scp>ii</scp>)/Zn co-catalyzed chemo-selective hydrogenation of α-methylene-γ-keto carboxylic acids
作者:Xuexin Zhang、Yang Gao、Ronibala Devi Laishram、Kangkui Li、Yong Yang、Yong Zhan、Yang Luo、Baomin Fan
DOI:10.1039/c9ob00005d
日期:——
An efficient Pd/Zn co-catalyzed chemo-selective hydrogenation of α-methylene-γ-keto carboxylic acids is described. This methodology offers a divergent synthesis of α-methyl-γ-keto carboxylic acids, α-methylcarboxylic acids, and lactones starting from α-methylene-γ-keto carboxylic acids via selectivehydrogenation by varying the catalytic conditions avoiding the use of high pressure of hydrogen. The
indispensable in organic synthesis. Alkyl Grignard reagents are usually prepared from the corresponding alkyl iodides, bromides, or chlorides with Mg, whereas alkyl fluorides are not viable substrates under conventional conditions due to the high stability of the C–F bonds. We report that Al–Rh bimetallic complexescatalyze the magnesiation of C(sp3)–F bonds of alkyl fluorides using easy-to-handle Mg