Application of palladium catalyses to a simple synthesis of (±)-pyrethrolone
作者:Jiro Tsuji、Tomio Yamakawa、Tadakatsu Mandai
DOI:10.1016/s0040-4039(01)95513-3
日期:1979.1
By sequential application of three palladium catalyzed reactions, namely, palladium catalyzed telomerization of butadiene with phenol, oxidation of terminalolefin of the telomer to methylketone, and palladium catalyzed elimination of phenol, an E and Z mixture of 5,7-octadien-2-one was prepared in a high yield. This compound was converted to an E and Z mixture of pyrethrolone. The Z form of pyrethrolone
A highly enantio- and regio-selective Markovnikov hydromonofluoro(methyl)alkylation of 1,3-dienes was developed using redox-neutral nickel catalysis. It provided a facile strategy to construct diverse monofluoromethyl- or monofluoroalkyl-containing chiral allylic molecules. Notably, this represents the first catalytic asymmetric Markovnikov hydrofluoroalkylation of olefins. The practicability of this
Ready Access to Functionally Embellished <i>cis</i>-Hydrindanes and <i>cis</i>-Decalins: Protecting Group-Free Total Syntheses of (±)-Nootkatone and (±)-Noreremophilane
作者:Kishor L. Handore、B. Seetharamsingh、D. Srinivasa Reddy
DOI:10.1021/jo401033j
日期:2013.8.16
A simple and efficient synthesis of functionalized cis-hydrindanes and cis-decalins was achieved using a sequential Diels-Alder/aldol approach in a highly diastereoselective manner. The scope of this method was tested with a variety of substrates and was successfully applied to the synthesis of two natural products in racemic form. The highlights of the present work provide ready access to 13 new cis-hydrindanes/cis-decalins, a protecting group-free total synthesis of an insect repellent Nootkatone, and the first synthesis of a Noreremophilane using the shortest sequence.