© Georg Thieme Verlag Stuttgart · New York

Abstract: Two different synthetic reactions catalyzed by an iridium complex are discussed. The first is allylic alkylation and allylic am-ination. This reaction proceeds via a -allyl iridium intermediate. The selectivity strongly depends on the structure of the allylic es-ters. Highly branched product-selective allylic substitution and highly Z-selective allylic substitution were achieved. The selectivi-ties of allylic substitution described here have not been achieved in previous studies with other transition metal complexes. The second reaction is [2+2+2] cycloaddition of ,-diynes with monoynes. This reaction proceeds via iridacyclopentadiene and tolerates vari-ous functional groups. Functionalized monoynes can be used. These results show that an iridium complex can be a useful catalyst for car