Divergent Regioselectivity in the Synthesis of Trisubstituted Allylic Alcohols by Nickel- and Ruthenium-Catalyzed Alkyne Hydrohydroxymethylation with Formaldehyde
作者:Cory C. Bausch、Ryan L. Patman、Bernhard Breit、Michael J. Krische
DOI:10.1002/anie.201101496
日期:2011.6.14
Stoichiometric metals banned: Nonsymmetrically disubstituted alkynes were converted into primary trisubstituted allylic alcohols upon exposure to paraformaldehyde in the presence of nickel or ruthenium catalysts, which exhibit complementary regioselectivity and complete stereoselectivity in the absence of exogenous reducing agents (see scheme).
禁止化学计量的金属:在镍或钌催化剂的存在下,低对称的二取代炔烃在暴露于低聚甲醛中时会转化为伯三取代的烯丙基醇,在没有外源还原剂的情况下,它们具有互补的区域选择性和完全的立体选择性(参见方案)。