专利号:US-11807617-B2 优先权日:2017-05-08 标题 :Highly efficient synthesis of Z-macrocycles using stereoretentive, ruthenium-based metathesis catalysts 发明人:AHMED TONIA S; GRUBBS ROBERT H 权利人:CALIFORNIA INST OF TECHN 摘要:A highly efficient, Z-selective ring-closing metathesis system for the formation of macrocycles using a stereoretentive, ruthenium-based catalyst supported by a dithiolate ligand is reported. This catalyst is demonstrated to be remarkably active as observed in initiation experiments showing complete catalyst initiation at −20° C. within 10 min. Using easily accessible diene starting materials bearing a Z-olefin moiety, macrocyclization reactions generated products with significantly higher Z-selectivity in appreciably shorter reaction times, in higher yield, and with much lower catalyst loadings than in previously reported systems. Macrocyclic lactones ranging in size from twelve-membered to seventeen-membered rings are synthesized in moderate to high yields (68-79% yield) with excellent Z-selectivity (95%-99% Z).
专利号:US-2020102285-A1 优先权日:2017-05-08 标 题:A highly efficient synthesis of z-macrocylces using stereoretentive, ruthenium-based metathesis catalysts
专利号:CN-110536748-A 优先权日:2017-05-08 标 题 :Highly Efficient Synthesis of Z-Macrocycles Using Steremaintaining Ruthenium-Based Metathesis Catalysts
专利号:US-11053209-B2 优先权日:2017-05-08 标 题:Highly efficient synthesis of z-macrocycles using stereoretentive, ruthenium-based metathesis catalysts
专利号:EP-3621729-B1 优先权日:2017-05-08 标 题 :A highly efficient synthesis of z-macrocycles using stereoretentive, ruthenium-based metathesis catalysts
专利号:CN-110536748-B 优先权日:2017-05-08 标 题:Highly efficient synthesis of Z-macrocycles using a sterically retentive ruthenium-based metathesis catalyst