- Synthesis of AD-Dihydrodipyrrins Equipped with Latent Substituents of Native Chlorophylls and Bacteriochlorophylls
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Native chlorophylls and bacteriochlorophylls share a common trans-substituted pyrroline ring D (17-propionic acid, 18-methyl), whereas diversity occurs in ring A particularly at the 3-position. Two dihydrodipyrrins equipped with native-like D-ring substit
- Wang, Pengzhi,Lindsey, Jonathan S.
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- Enantioselective Total Synthesis of Fluvirucinin B1
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A convergent synthesis of fluvirucinin B1 from acid ent-6a and nitrile ent-9, involving an organocopper coupling, a stereoselective allylation, a ring-closing metathesis reaction, and a stereoselective hydrogenation as the key steps, is reported. The starting building blocks have been prepared in a straightforward manner from a common phenylglycinol-derived lactam 1. An unprecedented regioselective oxidation of phenylglycinol-derived secondary amines 5 to carboxylic acids 6 has been developed.
- Guignard, Guillaume,Llor, Núria,Molins, Elies,Bosch, Joan,Amat, Mercedes
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supporting information
p. 1788 - 1791
(2016/05/19)
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- TRIAZOLE-ISOXAZOLE COMPOUND AND MEDICAL USE THEREOF
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A compound represented by Formula [I]: or pharmaceutically acceptable salt thereof, wherein each symbol is as defined in the description.
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- Construction of a fully substituted cyclopentenone as the core skeleton of stemonamide via a Nazarov cyclization
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A synthetic study of the Stemona alkaloid stemonamide is described. The FeCl3-promoted fast Nazarov reaction of β-alkoxy divinyl ketones in the presence of t-BuOH afforded an α-methylene cyclopentenone, which was subsequently subjected to the R
- Yaji, Kentaro,Shindo, Mitsuru
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body text
p. 5469 - 5472
(2010/10/20)
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- Total synthesis of (+)-nakadomarin A
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The total synthesis of (+)-nakadomarin A is described. A three-component cycloaddition of a hydroxylamine, aldehyde, and cyclopropane to form a highly functionalized tetrahydro-1,2-oxazine serves as the foundation for this synthesis. The resulting oxazine
- Young, Ian S.,Kerr, Michael A.
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p. 1465 - 1469
(2008/01/27)
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- Intramolecular electron transfer initiated cation and radical formation through carbon-carbon bond activation
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Radical cations can be formed in a spatially and temporally controlled manner by appending a sacrificial photooxidant to an easily oxidized substrate, leading to intramolecular electron transfer upon irradiation. The anthraquinone carboxyl group is an effective photooxidant that can promote single electron oxidation from an appended arene. The resulting intermediates undergo a cleavage reaction through carbon-carbon bond activation to provide either cations or radicals that react to form a range of products.
- Wangyang, Tu,Floreancig, Paul E.
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p. 2389 - 2392
(2008/02/05)
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- Enantioselective syntheses of ring-C precursors of vit. B12. Reagent control
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(Figure presented) Enelactones of the general structure S-(-)-I were prepared in three steps from alcohol 21 and acids 22 (ee ≈ 85%). Lactones S-(-)-I are versatile precursors to enelactams II of the type found in Vitamin B12.
- Jacobi, Peter A.,Li, Yongkai
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p. 701 - 704
(2007/10/03)
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