Pd-Catalyzed sp2 C–H Hydroxylation with TFA/TFAA via Weak Coordinations
作者:Yu Rao
DOI:10.1055/s-0033-1339871
日期:——
An efficient sp2 C–H hydroxylation has been developed for the synthesis of a wide range of functionalized phenols with aryl ketones, benzoates, benzamides, acetanilides and sulfonamides through palladium(II) catalysis. A trifluoroacetic acid (TFA)/trifluoroacetic anhydride (TFAA) co-solvent system serves as the oxygen source and is the critical factor for weak coordination promoted C–H activation.
已开发出一种有效的 sp2 C-H 羟基化反应,用于通过钯 (II) 催化合成各种官能化酚与芳基酮、苯甲酸酯、苯甲酰胺、乙酰苯胺和磺酰胺。三氟乙酸(TFA)/三氟乙酸酐(TFAA)共溶剂体系作为氧源,是弱配位促进C-H活化的关键因素。
Intermediates in the cleavage of endoperoxides
作者:Marcel Bauch、Matthias Klaper、Torsten Linker
DOI:10.1002/poc.3607
日期:2017.4
fragmentations take place, affording anthraquinone, and reactive oxygen species. This mechanism explains the often observed decomposition of endoperoxides during work‐up. Finally, an acid‐catalyzed cleavage has been observed under release of hydrogen peroxide. The results should be interesting for the mechanistic understanding of peroxide decomposition and the endoperoxides might serve as mild sources