Efficient Suzuki and Stille Reactions for Regioselective Strategies of Incorporation of the 1,3-Oxazole Heterocycle: Mild Desulfonylation for the Synthesis of C-4 and C-5 Monosubstituted Oxazoles
作者:David Williams、Liangfeng Fu
DOI:10.1055/s-0029-1220128
日期:2010.7
Suzuki and Stille cross-coupling reactions are surveyed for site-selective C-4 and C-5 elaboration of 2-(phenylsulfonyl)-1,3-oxazole derivatives. Conditions for mild reductive desulfonylations provide for direct incorporation of the intact oxazole heterocycle through bonding at C-4 and C-5.
Studies on Selective Metalation and Cross-Coupling Reactions of Oxazoles
作者:Dirk Menche、Raphael Wagner、Philipp Wollnitzke、Sebastian Essig、Jan P. Gölz
DOI:10.1055/a-2126-0720
日期:2023.12
that was based on the different pK a values of these positions, while a halide at C4 may be introduced by an optimized halogen dance reaction. Efficient protocols for subsequent sp2–sp2 and sp2–sp3 cross-coupling reactions of the derived oxazolyl halides were then established. This modular approach was applied in the total synthesis of ajudazol A and a selected analogue, demonstrating the general feasibility