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Transition metal complexes in organic synthesis, part 54. Improved total syntheses of the antibiotic alkaloids carbazomycin A and B

✍ Scribed by Hans-Joachim Knölker; Wolfgang Fröhner


Publisher
Elsevier Science
Year
1999
Tongue
French
Weight
228 KB
Volume
40
Category
Article
ISSN
0040-4039

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✦ Synopsis


Considerably improved total syntheses of the carbazole antibiotics carbazomycin A and B are reported using a convergent iron-mediated one-pot construction of the carbazole framework by oxidative cyclization in the air.


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Transition Metal-Diene Complexes in Orga
✍ Hans-Joachim Knölker; Michael Bauermeister 📂 Article 📅 1993 🏛 John Wiley and Sons 🌐 German ⚖ 945 KB

Evidence for the structure of 13 was provided by the sharp s at 12.67 ppm (phenol OH) in the 'H-NMR spectrum. The substitution pattern was confirmed by NOE difference spectra. Irradiation at the Me signal at 2.28 ppm resulted in a NOE of the aromatic proton at 6.67 ppm.

Transition metal complexes in organic sy
✍ Hans-Joachim Knölker; Wolfgang Fröhner 📂 Article 📅 1997 🏛 Elsevier Science 🌐 French ⚖ 293 KB

The first total synthesis of the carbazole quinol alkaloids carbazomycin G and H has been achieved by a highly convergent synthesis using an iron-mediated construction of the carbazole nucleus as key-step. @ 1997 Elsevier Science Ltd. The carbazomycins A to H were isolated by Nakamura and co-worker