Regio- and Stereoselective Synthesis of Cyclopentenones: Intermolecular Pseudo-Pauson-Khand Cyclization
作者:José Barluenga、Ana Álvarez-Fernández、Ángel L. Suárez-Sobrino、Miguel Tomás
DOI:10.1002/anie.201105362
日期:2012.1.2
two‐step access to polysubstituted cyclopentenones from terminal alkynes, [M(CO)6], and bromoalkenes is described. This protocol is an alternative to the intermolecular Pauson–Khand reaction, and can be used with a variety of bromoalkenes. Moreover, the final quenching allows the installation of reactive electrophiles (E). The enantiopure product cyclopentenones can be synthesized with an all‐carbon‐substituted
Modular Synthesis of a Versatile Double‐Allylation Reagent for Complex Diol Synthesis
作者:Stanna K. Dorn、Annika E. Tharp、M. Kevin Brown
DOI:10.1002/anie.202103435
日期:2021.7.12
Double-allylation reagents allow for the construction of highly complex molecules in an expedient fashion. We have developed an efficient, modular, and enantioselective approach towards accessing novel variants of these reagents through Cu/Pd-catalyzed alkenylboration of alkenylboron derivatives. Importantly, we demonstrate novel use of an allylBdan reagent directly in a stereocontrolled allylation