In Situ Methylene Capping: A General Strategy for Efficient Stereoretentive Catalytic Olefin Metathesis. The Concept, Methodological Implications, and Applications to Synthesis of Biologically Active Compounds
作者:Chaofan Xu、Xiao Shen、Amir H. Hoveyda
DOI:10.1021/jacs.7b06552
日期:2017.8.9
catalyst-controlled stereoselective olefinmetathesis considerably. By incorporation of commercially available Z-butene together with robust and readily accessible Ru-based dithiolate catalysts developed in these laboratories, a large variety of transformations can be made to proceed with terminal alkenes, without the need for a priori synthesis of a stereochemically defined disubstituted olefin. Reactions thus proceed
(Z)-5-Tetradecen-14-olide, a New Macrocyclic Lactone, and Two Unsaturated Straight Chain Acetates from Ambrette Seed Absolute
作者:Bruno Maurer、Alfred Grieder
DOI:10.1002/hlca.19770600403
日期:1977.6.1
(Z)-5-Tetradecen-14-olide (1), (Z)-5-dodecenyl acetate (2), and (Z)-5-tetradecenyl acetate (3) have been isolated from the absolute oil of Hibiscus abelmoschusL. The lactone 1 is a newmacrocyclic musk compound, and the occurrence of the twoacetates 2 and 3 in a plant is reported for the first time. Syntheses of the three compounds are described.