Metal-mediated reactions of aryl isocyanates with dimethoxycarbene to form isatin derivatives
作者:James H. Rigby、Stephanie A. Brouet
DOI:10.1016/j.tetlet.2013.03.032
日期:2013.5
established as the observed product in the reaction of arylisocyanates with dimethoxycarbene. A change in the reactivity profile of dimethoxycarbene with arylisocyanates was observed upon the addition of a metal species. Methodology has been developed in which the outcome of nucleophilic carbene reactions with isocyanates can be controlled with simple changes to reaction conditions.
Reaction of Amide and Sodium Azide for the Synthesis of Acyl Azide, Urea, and Iminophosphorane
作者:Devaneyan Joseph、Sunwoo Lee
DOI:10.1021/acs.orglett.2c02429
日期:2022.8.26
in DMF at 25 °C and produce the symmetrical ureas in THF/H2O at 80 °C via the sequential reaction of acyl substitution and Curtius rearrangement. All acyl azides were also obtained from the secondary amides via sequential reaction of p-toluenesulfonyl chloride and NaN3. In addition, keto-stabilized iminophosphoranes were prepared from a one-pot reaction of amides, NaN3, and phosphines.
酰胺与 NaN 3在 25 °C 下在 DMF 中反应生成酰基叠氮化物,并在 80 °C 下通过酰基取代和 Curtius 重排的顺序反应在 THF/H 2 O 中生成对称脲。所有的酰基叠氮化物也是由仲酰胺通过对甲苯磺酰氯和NaN 3 的顺序反应得到的。此外,由酰胺、NaN 3和膦的一锅法反应制备了酮基稳定的亚氨基正膦。
Rapid construction of isatin derivatives via addition of bis(alkylthio)carbenes to aryl isocyanates
作者:James H. Rigby、M.Diana Danca
DOI:10.1016/s0040-4039(99)01392-1
日期:1999.9
Thermally induced cyclization between bis(alkylthio)carbenes, derived from the corresponding oxadiazolines, and substituted aryl isocyanates provides access to a variety of isatin derivatives with good efficiency. (C) 1999 Elsevier Science Ltd. All rights reserved.
Bis(alkylthio)carbenes as Novel Reagents for Organic Synthesis
作者:James H. Rigby、Stephane Laurent、Weitong Dong、M.Diana Danca
DOI:10.1016/s0040-4020(00)00855-3
日期:2000.12
Bis(alkylthio)carbenes have been shown to be a useful class of reactive intermediates for applications to organic synthesis. Substituted hydroindolanes, isatins and hydroquinolones can be prepared by the addition of these carbenes to vinyl isocyanates. (C) 2000 Elsevier Science Ltd. All rights reserved.