Total Synthesis of (+)-Isolaurepinnacin. Use of Acetal-Alkene Cyclizations To Prepare Highly Functionalized Seven-Membered Cyclic Ethers
作者:Daniel Berger、Larry E. Overman、Paul A. Renhowe
DOI:10.1021/ja964080b
日期:1997.3.1
The first synthesis of the title compound is described. The synthesis features an acetal-vinylsilane cyclization to stereoselectively form the cis-2,7-disubstituted oxepene ring and introduce Δ4 unsaturation. Starting with (2R,3S)-2,3-epoxypentan-1-ol (16), mixed acetal 10 is formed in five steps and 72% overall yield. Treatment of 10 with excess BCl3 in CH2Cl2 at −78 → 0 °C promotes cyclization to
Diversification of (<i>E,E</i>)-1,6-Dioxo-2,4-Dienes for the Synthesis of (+)-Aspicillin, Isolaurepan, and β-Parinaric Acid
作者:Dattatraya H. Dethe、Aparna Srivastava、Appasaheb K. Nirpal、Nagabhushana C. Beeralingappa、Vimlesh Kumar、Arsheed A. Bhat
DOI:10.1021/acs.joc.2c01280
日期:2022.8.19
A divergent formal synthesis of polyhydroxylated macrocyclic lactone (+)-aspicillin and polyene bioactive natural product β-parinaric acid and the total synthesis of non-terpenoid metabolite isolaurepan have been achieved using a ruthenium-catalyzed stereo- and chemoselective oxidative coupling reaction of easily accessible vinyl ketones and acrylates. The crucial transformation involves the efficient
A new, enantioselective synthesis of (+)-isolaurepan
作者:Gonzalo Pazos、Manuel Pérez、Zoila Gándara、Generosa Gómez、Yagamare Fall
DOI:10.1016/j.tetlet.2009.07.041
日期:2009.9
A highly enantioselective synthesis of 2,6-syn-disubstituted tetrahydropyrans from commercially available tri-O-acetyl-D-glucal, based on a thermal Claisen rearrangement, allows enantioselective synthesis of (+)-isolaurepan when combined with a ring expansion reaction Using trimethylsilyldiazomethane. (c) 2009 Elsevier Ltd. All rights reserved.
A total synthesis of (+)-isolaurepan
作者:Divya Tripathi、Pradeep Kumar
DOI:10.1016/j.tetlet.2008.09.134
日期:2008.12
A versatile and efficient method for the enantioselective synthesis of 2,7-cis-disubstituted oxepane 1c, (+)-isolaurepan, using oxidative resolution of a secondary alcohol and highly diastereoselective Et3SiH/TMSOTf-promoted reductive cyclization of a hydroxy ketone is described. (C) 2008 Elsevier Ltd. All rights reserved.