Short Enantioselective Total Syntheses of <i>trans</i>-Clerodane Diterpenoids: Convergent Fragment Coupling Using a <i>trans</i>-Decalin Tertiary Radical Generated from a Tertiary Alcohol Precursor
作者:Yuriy Slutskyy、Christopher R. Jamison、Gregory L. Lackner、Daniel S. Müller、André P. Dieskau、Nicholas L. Untiedt、Larry E. Overman
DOI:10.1021/acs.joc.6b00697
日期:2016.8.19
strategy for the enantioselective total synthesis of trans-clerodane diterpenoids is described. The key bond construction is accomplished by 1,6-addition of a trans-decalin tertiary radical with 4-vinylfuran-2-one. The tertiary radical is optimally generated from the hemioxalate salt of the corresponding tertiary alcohol upon activation by visible light and an Ir(III) photoredox catalyst. The enantioselective
作者:Jacob T. Edwards、Rohan R. Merchant、Kyle S. McClymont、Kyle W. Knouse、Tian Qin、Lara R. Malins、Benjamin Vokits、Scott A. Shaw、Deng-Hui Bao、Fu-Liang Wei、Ting Zhou、Martin D. Eastgate、Phil S. Baran
DOI:10.1038/nature22307
日期:2017.5
or geometry from one of the most ubiquitous and variegated building blocks of chemistry: alkyl carboxylic acids. The activating principles used in amide-bond synthesis can therefore be used, with nickel- or iron-based catalysis, to extract carbon dioxide from a carboxylic acid and economically replace it with an organozinc-derived olefin on a molar scale. We prepare more than 60 olefins across a range
Correction to “Constructing Quaternary Stereogenic Centers Using Tertiary Organocuprates and Tertiary Radicals. Total Synthesis of <i>trans</i>-Clerodane Natural Products”
作者:Daniel S. Müller、Nicholas L. Untiedt、André P. Dieskau、Gregory L. Lackner、Larry E. Overman
DOI:10.1021/jacs.5b01078
日期:2015.4.15
Constructing Quaternary Stereogenic Centers Using Tertiary Organocuprates and Tertiary Radicals. Total Synthesis of <i>trans</i>-Clerodane Natural Products
作者:Daniel S. Müller、Nicholas L. Untiedt、André P. Dieskau、Gregory L. Lackner、Larry E. Overman
DOI:10.1021/ja512527s
日期:2015.1.21
A new concise construction of trans-clerodane diterpenoids is reported in which oxacyclic and trans-hydronaphthalene fragments are coupled, and the critical C9-quaternary carbon stereocenter formed stereoselectively, by 1,6-addition of a tertiary cuprate or a tertiary carbon radical to β-vinylbutenolide. This strategy is specifically illustrated by total syntheses of (-)-solidagolactone (4), (-)-16-hydroxycleroda-3