Synthesis of Functionalized Oxazolines and Oxazoles with DAST and Deoxo-Fluor
作者:Andrew J. Phillips、Yoshikazu Uto、Peter Wipf、Michael J. Reno、David R. Williams
DOI:10.1021/ol005777b
日期:2000.4.1
[formula: see text] A mild and highly efficient cyclization of beta-hydroxy amides to oxazolines is described using DAST and Deoxo-Fluor reagents. A one-pot protocol for the synthesis of oxazoles from beta-hydroxy amides is also presented.
Oxidation of Oxazolines and Thiazolines to Oxazoles and Thiazoles. Application of the Kharasch−Sosnovsky Reaction
作者:A. I. Meyers、Francis X. Tavares
DOI:10.1021/jo9613491
日期:1996.11.15
Kharasch-Sosnovsky reaction, the oxidation of oxazolines and thiazolines bearing a variety of 2-alkyl substituents (chiral and achiral) were smoothly oxidized to their corresponding oxazoles and thiazoles, respectively. The key feature involved in the successful implementation of this important oxidation was the use of a mixture of Cu(I) and Cu(II) salts to enhance the oxidation of the intermediate captodative
The rapid synthesis of oxazolines and their heterogeneous oxidation to oxazoles under flow conditions
作者:Steffen Glöckner、Duc N. Tran、Richard J. Ingham、Sabine Fenner、Zoe E. Wilson、Claudio Battilocchio、Steven V. Ley
DOI:10.1039/c4ob02105c
日期:——
A rapid flow synthesis of oxazolines and their oxidation to the corresponding oxazoles is reported. The oxazolines are prepared at room temperature in a stereospecific manner, with inversion of stereochemistry, from β-hydroxy amides using Deoxo-Fluor®. The corresponding oxazoles can then be obtained via a packed reactor containing commercial manganese dioxide.
Formal Total Synthesis of Diazonamide A by Indole Oxidative Rearrangement
作者:Nadège David、Raffaele Pasceri、Russell R. A. Kitson、Alexandre Pradal、Christopher J. Moody
DOI:10.1002/chem.201601605
日期:2016.7.25
A short formal total synthesis of the marine natural product diazonamide A is described. The route is based on indole oxidative rearrangement, and a number of options were investigated involving migration of tyrosine or oxazole fragments upon oxidation of open chain or macrocyclic precursors. The final route proceeds from 7‐bromoindole by sequential palladium‐catalysed couplings of an oxazole fragment