Aromatic Borylation/Amidation/Oxidation: A Rapid Route to 5-Substituted 3-Amidophenols
作者:Feng Shi、Milton R. Smith、Robert E. Maleczka
DOI:10.1021/ol060207i
日期:2006.3.1
5-Substituted 3-amidophenols are prepared by subjecting 3-substituted halobenzenes to an Ir-catalyzed aromatic borylation, followed by a Pd-catalyzed amidation, and finally an oxidation of the boronic ester intermediate. The entire C-H activation borylation/amidation/oxidation sequence can be accomplished without isolation of any intermediate arenes. Usefully, amide partners can include lactams, carbamates, and ureas.
Two Approaches to the Aromatic Core of the Aminonaphthoquinone Antibiotics
作者:Christopher C. Nawrat、Leoni I. Palmer、Alexander J. Blake、Christopher J. Moody
DOI:10.1021/jo400737f
日期:2013.6.7
Two complementary approaches are presented for the synthesis of the quinone chromophores of the naphthoquinone ansamycins and related natural products. The first involves the use of an improved protocol for the manganese(III) acetate mediated cyclization of 5-aryl-1,3-dicarbonyl compounds to β-naphthols, leading to the simple, scalable preparation of building blocks suitable for the synthesis of naturally