Organocatalytic Atroposelective Arylation of 2-Naphthylamines as a Practical Approach to Axially Chiral Biaryl Amino Alcohols
作者:Ye-Hui Chen、Liang-Wen Qi、Fang Fang、Bin Tan
DOI:10.1002/anie.201710537
日期:2017.12.18
The phosphoric acid catalyzeddirect arylation of 2-naphthylamines with iminoquinones enables the atroposelective synthesis of axiallychiral biaryl amino alcohols. Many functional groups are tolerated in this reaction, and it is a rare example of 2-naphthylamines acting as nucleophiles in an organocatalytic enantioselective transformation.
The Diels–Alder reactions of para-benzoquinone nitrogen-derivatives: an experimental and theoretical study
作者:Marciana P. Uliana、Bruno M. Servilha、Olga Alexopoulos、Kleber T. de Oliveira、Cláudio F. Tormena、Marco A.B. Ferreira、Timothy J. Brocksom
DOI:10.1016/j.tet.2014.07.088
日期:2014.9
An experimental and theoreticalstudy of the comparative reactivity and selectivity of the Diels–Alder reactions of para-benzoquinones and three nitrogen derivatives have been performed. The mono-oximes derivatives do not react under the tested reaction conditions, whereas the tosylated mono-oximes react slowly. However, the mono N-tosyl imines show excellent reactivity, and superior to the parent
Halogenation of N-substituted para-quinone monoimine and para-quinone monooxime esters: V. Chlorination and bromination of N-arylsulfonyl-1,4-benzoquinone monoimines dialkyl-substituted in the quinoid ring
作者:A. P. Avdeenko、S. A. Konovalova
DOI:10.1134/s1070428006050058
日期:2006.5
The direction of halogen addition to N-arylsulfonyl-1,4-benzoquinone monoimines dialkyl-substituted in the quinoid ring is governed by the steric factors: the size and position of the substituent, the halogen volume, and the position of the substituent at the nitrogen. The first stage of halogenation of N-arylsulfonyl-4-aminophenols with two alkyl substituents in the phenylsulfonyl ring largely occurs as electrophilic substitution.
Thiocyanation of N-arylsulfonyl-, N-aroyl-, and N-[(N-arylsulfonyl)benzimidoyl]-1,4-benzoquinone imines
作者:A. P. Avdeenko、V. V. Pirozhenko、S. A. Konovalov、D. A. Roman’kov、G. V. Palamarchuk、O. V. Shishkinc
DOI:10.1134/s1070428009030105
日期:2009.3
Reactions of thiocyanate ion with N-aroyl-, N-arylsulfonyl-, and N-(N-arylsulfonylbenzimidoyl)-1,4-benzoquinone imines follow the 1,4-addition pattern, and the adducts undergo intramolecular cyclization to give the corresponding N-substituted 5-amino-1,3-benzoxathiol-2-ones as final products.
Reaction of N-substituted 2,5-dialkyl-1,4-benzoquinone imines with arenesulfinic acids
作者:A. P. Avdeenko、S. A. Konovalova、D. A. Roman’kov、O. N. Ludchenko、I. L. Marchenko
DOI:10.1134/s1070428009030063
日期:2009.3
Reactions of N-aroyl-, N-arylsulfonyl-, and N-(N-arylsulfonylbenzimidoyl)-2,5-dialkyl-1,4-benzoquinone imines with sodium arenesulfinates in acetic acid gave the corresponding 1,4-, 6,1-, and 1,6-addition products. Variation of the size and donor power of substituents in positions 2 and 5 of the quinoid ring almost does not affect the ratio of the addition products, which is determined mainly by the nature of substituent on the nitrogen atom.