Palladium/monophosphine complexes catalyze trans-selective arylative, alkenylative, and alkylative cyclization reactions of alkynals and alkynones with organoboronic reagents. These reactions afford six-membered allylic alcohols with endo-tri- or tetrasubstituted olefin groups and/or five-membered counterparts with exo olefin groups. The ratios of these products are dramatically affected by alkyne
钯/单膦配合物催化炔醇和炔酮与有机硼试剂的反式选择性芳基化、烯基化和烷基化环化反应。这些反应提供具有内三或四取代烯烃基团的六元
烯丙醇和/或具有外烯烃基团的五元对应物。这些产物的比例受到
炔烃取代基和
膦配体的显着影响。该过程显着的反式选择性源于新的反应机制,包括氧化加成而不形成氧杂
金属环。