Iron-Catalyzed C-Allylating Partial Dearomatization of Naphthols
摘要:
The iron complex Bu4N[Fe(CO)(3)(NO)](TBA[Fe]) catalyzes the intermolecular allylation of naphthol derivatives to give the corresponding partially dearomatized allylated chromenones in good to excellent yields. The scope and limitations are reported. An efficient decarboxylative intramolecular C- allylation, starting from allyl naphthyl carbonates, was developed. From a mechanistic point of view, the overall process is the result of a fast O- allylation followed by a sigmatropic rearrangement to the desired product.
Iron-Catalyzed Dioxygen-Driven C–C Bond Formation: Oxidative Dearomatization of 2-Naphthols with Construction of a Chiral Quaternary Stereocenter
摘要:
Iron(salan) complex 1 was found to catalyze the oxidative dearomatization of 1-substituted 2-naphthols with the formation of an all-carbon quaternary stereocenter in air in the presence of nitroalkanes, to afford the corresponding cyclic enones with high enantioselectivity of 88-96% ee.
A Pd-catalyzed linear selective intermolecular asymmetric dearomative allylicalkylation reaction of naphthols with alkoxyallenes under mild reaction conditions is reported. The transformation is successfully promoted by Pd2(dba)3 and the chiral Trost ligand and provides a general atom-efficient protocol to obtain various β-naphthalenones bearing an all carbon quaternary stereogenic center in good
A catalytic asymmetricdearomatization of 2‐naphthols with azodicarboxylates has been accomplished by using a N,N′‐dioxide‐scandium(III) complex as a chiral catalyst. A number of optically active β‐naphthalenone compounds with a nitrogen‐containing quaternary carbon stereocenter were obtained in up to 99 % yield and up to 99 % ee under mild reaction conditions. The reaction could be scaled up to a