Acid-catalyzed synthesis of condensed polycyclic diaryl ethers from arenols
作者:Saori Tanii、Mieko Arisawa、Masahiko Yamaguchi
DOI:10.1039/c9cc07172e
日期:——
Diarylethers containing condensed polycyclic aryl groups were synthesized from arenols in the presence of a catalytic amount of p-chlorobenzenesulfonic acid. Symmetrical binaphthyl, biphenanthryl, and bipyrenyl ethers were obtained in high yields. Unsymmetrical derivatives were also synthesized from 9-phenanthrol and arenols, using combinations of reactive and unreactive substrates.
Lewis acid catalyzed isomerization of 7-oxabicyclic alkenes into 1 -naphthol derivatives in high yields (87-98%) under mild reaction conditions has been developed. The mechanism of this reaction is briefly postulated.
Water-promoted synthesis of fused bicyclic triazolines and naphthols from oxa(aza)bicyclic alkenes and transformation <i>via</i> a novel ring-opening/rearrangement reaction
作者:Wenkun Chen、Wen Yang、Ruihua Wu、Dingqiao Yang
DOI:10.1039/c7gc03772d
日期:——
An efficient three-component domino reaction among oxa(aza)bicyclic alkenes, sodium azide, and primary haloalkanes is reported, which offers a mild access to 1,2,3-triazolines in an aqueous medium with excellent diastereoselectivities and yields. Further studies show that, water-promoted isomerization of oxa(aza)bicyclic alkenes can afford 1-naphthol derivatives in good yields. Water not only promotes
Chiral Phosphoric Acid-Catalyzed Enantioselective Aza-Friedel–Crafts Addition of Naphthols with Isatin-Derived Ketimines
作者:Mei Duan、Jingchao Chen、Ting Wang、Shaojian Luo、Meifen Wang、Baomin Fan
DOI:10.1021/acs.joc.2c01659
日期:2022.11.18
The enantioselective Friedel–Crafts addition of naphthols with isatin-derived ketimines was developed with H8-BINOL-derived chiral biaryl phosphoric acid. A wide range of isatin-derived ketimines and naphthols were successfully applied and gave a series of chiral 3-amino-2-oxindoles in excellent yields with high optical purities.
萘酚与靛红衍生的酮亚胺的对映选择性 Friedel-Crafts 加成是用 H 8 -BINOL 衍生的手性联芳基磷酸开发的。广泛的靛红衍生物酮亚胺和萘酚被成功应用,并以优异的产率和高光学纯度得到一系列手性 3-氨基-2-羟吲哚。
Enantioselective Intramolecular <i>ortho</i> Photocycloaddition Reactions of 2‐Acetonaphthones
作者:Peng Yan、Simone Stegbauer、Qinqin Wu、Elena Kolodzeiski、Christopher J. Stein、Ping Lu、Thorsten Bach
DOI:10.1002/anie.202318126
日期:2024.3.22
The intramolecular ortho photocycloaddition of 2-acetonaphthones has been achieved with high enantioselectivity. The catalytic use of a chiral Lewis acid was critical for the success of the reaction and its mode of action has been elucidated by mechanistic experiments and calculations. The primary photocycloaddition products underwent photochemically or thermally a variety of consecutive reactions