Convenient synthesis of optically active 1,2-diol monosulfonates and terminal epoxides via oxazaborolidine-catalyzed asymmetric borane reduction of α-sulfonyloxy ketones
作者:Byung Tae Cho、Weon Ki Yang、Ok Kyung Choi
DOI:10.1039/b010155i
日期:——
A very convenient asymmetric synthesis of 1,2-diol monosulfonates and terminal epoxides with high optical purity via oxazaborolidine-catalyzedasymmetricboranereduction of α-sulfonyloxy ketones using N-ethyl-N-isopropylaniline–borane complex as borane carrier has been developed.
Mohan, Jag; Singh, Virender; Kataria, Sangeeta, Journal of the Chinese Chemical Society, 1994, vol. 41, # 5, p. 617 - 619
作者:Mohan, Jag、Singh, Virender、Kataria, Sangeeta
DOI:——
日期:——
Regioselective three-component synthesis of 1,2-diarylindoles from cyclohexanones, α-hydroxyketones and anilines under transition-metal-free conditions
作者:Cheng Li、Yanjun Xie、Fuhong Xiao、Huawen Huang、Guo-Jun Deng
DOI:10.1039/c9cc00943d
日期:——
A facile method for the one-pot synthesis of 1,2-diarylindoles under transition-metal-free conditions is described. Cyclohexanones were used as the aryl sources via the dehydrogenative aromatization process. One C–C and two C–N bonds were selectively formed via a domino reaction. This protocol provides a convenient approach for the construction of valuable bioactive 1,2-diarylindoles from readily available
Iodine-Mediated α-Sulfonyloxylation of Alkyl Aryl Ketones with Oxone® and Sulfonic Acids
作者:Hideo Togo、Hiroki Kikui、Katsuhiko Moriyama
DOI:10.1055/s-0032-1318199
日期:——
α-iodoketone and a subsequently formed α-iodosylketone. The latter reacts with the sulfonicacid to afford the α-sulfonyloxyketone product. Alkyl aryl ketones are converted into the corresponding α-sulfonyloxyketones, in moderate to excellent yields, via a novel procedure that utilizes Oxone®, p-toluenesulfonic acid or methanesulfonic acid and molecular iodine in a mixture of acetonitrile and 2,2,2-trifluoroethanol