Aromatic nitro-compounds. Studies of the amination of 9-nitrophenanthrene and of the mononitrobiphenylenes
作者:J. W. Barton、A. R. Grinham、K. E. Whitaker
DOI:10.1039/j39710001384
日期:——
Nucleophilic aminations of 9-nitrophenanthrene and of 2-nitrobiphenylene have given 9-amino-10-nitrophenanthrene (I; R = NH2) and 2-amino-3-nitrobiphenylene (III; R = NH2) respectively; under the same conditions 1-nitrobiphenylene is unreactive. Some reactions of amines (I; R = NH2) and (III; R = NH2) are described.
In suspended particulates collected in Yokohama over various 24-h periods, the following seven nitrophenols were detected ; o-nitrophenol, p-nitrophenol, 2, 6-dinitrophenol, 2, 4-dinitrophenol, 2-methyl-6-nitrophenol, 2-methyl-4-nitrophenol and 3-methyl-4-nitrophenol. These nitrophenols were also observed in smog chamber experiments carried out with benzene and toluene in the presence of nitrogen dioxide in air.
Pd-Catalyzed intermolecular asymmetric allylic dearomatization of 1-nitro-2-naphthols with MBH adducts
作者:Qing-Xia Zhang、Jia-Hao Xie、Qing Gu、Shu-Li You
DOI:10.1039/d3cc00568b
日期:——
An asymmetric allylic dearomatization reaction of 1-nitro-2-naphthol derivatives with Morita–Baylis–Hillman (MBH) adducts has been developed. By utilizing Pd catalyst derived from Pd(OAc)2 and Trost ligand (R,R)-L1, the reaction proceeded smoothly in 1,4-dioxane at room temperature, affording substituted β-naphthalenones in good yields (up to 92%) and enantioselectivity (up to 90% ee). A range of substituted
开发了 1-硝基-2-萘酚衍生物与 Morita-Baylis-Hillman (MBH) 加合物的不对称烯丙基脱芳构化反应。利用Pd(OAc) 2和Trost配体( R , R )- L1衍生的Pd催化剂,反应在室温下在1,4-二氧六环中顺利进行,以良好的收率(高达92%)得到取代的β-萘酮和对映选择性(高达 90% ee)。发现一系列取代的 1-nitro-2-naphthols 和 MBH 加合物在优化条件下是相容的。该反应为合成富含对映体的1-硝基-β-萘酮衍生物提供了一种简便的方法。
Barlas, H.; Parlar, H.; Kotzias, D., Zeitschrift fur Naturforschung, Teil B: Anorganische Chemie, Organische Chemie, 1982, vol. 37, # 4, p. 486 - 489