Preparation of Polyfunctional Arylzinc Organometallics in Toluene by Halogen/Zinc Exchange Reactions
作者:Moritz Balkenhohl、Dorothée S. Ziegler、Alexandre Desaintjean、Leonie J. Bole、Alan R. Kennedy、Eva Hevia、Paul Knochel
DOI:10.1002/anie.201906898
日期:2019.9.9
toluene within 10 min to 5 h through an I/Zn or Br/Zn exchange reaction using bimetallic reagents of the general formula R'2 Zn⋅2 LiOR (R'=sBu, tBu, pTol). Highly sensitive functional groups, such as a triazine, a ketone, an aldehyde, or a nitro group, were tolerated in these exchange reactions, enabling the synthesis of a plethora of functionalized (hetero)arenes after quenching with various electrophiles
使用通式R'2Zn⋅2LiOR(R'= sBu)的双金属试剂,通过I / Zn或Br / Zn交换反应,在10分钟至5小时内,在甲苯中制备了多种多官能的二芳基和二杂芳基锌物质。 ,tBu,pTol)。在这些交换反应中可以耐受高度敏感的官能团,例如三嗪,酮,醛或硝基,从而可以在用各种亲电试剂淬灭后合成大量官能化的(杂)芳烃。对这些双金属混合物的组成和反应性的深入了解揭示了[R'2 Zn(OR)2 Li2]型高活性二有机二烷氧基锌酸锂的形成。