Nickel-Catalyzed Carboxylation of Aryl and Heteroaryl Fluorosulfates Using Carbon Dioxide
作者:Cong Ma、Chuan-Qi Zhao、Xue-Tao Xu、Zhao-Ming Li、Xiang-Yang Wang、Kun Zhang、Tian-Sheng Mei
DOI:10.1021/acs.orglett.9b00836
日期:2019.4.5
The development of efficient and practical methods to construct carboxylic acids using CO2 as a C1 synthon is of great importance. Nickel-catalyzed carboxylation of aryl fluorosulfates and heteroaryl fluorosulfates with CO2 is described, affording arene carboxylic acids with good to excellent yields under mild conditions. In addition, a one-pot phenol fluorosulfation/carboxylation is developed.
Direct Access to Aryl Bis(trifluoromethyl)carbinols from Aryl Bromides or Fluorosulfates: Palladium-Catalyzed Carbonylation
作者:Katrine Domino、Cedrick Veryser、Benjamin A. Wahlqvist、Cecilie Gaardbo、Karoline T. Neumann、Kim Daasbjerg、Wim M. De Borggraeve、Troels Skrydstrup
DOI:10.1002/anie.201802647
日期:2018.6.4
A palladium‐catalyzed carbonylative approach for the direct conversion of (hetero)aryl bromides into their α,α‐bis(trifluoromethyl)carbinols is described, and it employs only stoichiometric amounts of carbon monoxide and trifluoromethyltrimethylsilane. In addition, aryl fluorosulfates proved highly compatible with these reaction conditions. The method is tolerant of a diverse set of functional groups
Synthesis of <i>N</i>-Acyl Sulfamates from Fluorosulfates and Amides
作者:Philippe Gilles、Cedrick Veryser、Sarah Vangrunderbeeck、Sam Ceusters、Luc Van Meervelt、Wim M. De Borggraeve
DOI:10.1021/acs.joc.8b02785
日期:2019.1.18
A novel synthetic strategy toward N-acyl sulfamates was developed. Interestingly, fluorosulfates, a new emerging class of electrophiles, were used to construct the sulfamate core. This precludes handling of chlorosulfonyl isocyanate and sulfamoyl chloride. In combination with amides, a wide and diverse set of N-acyl sulfamates was synthesized, including functionalized bioactive compounds. Furthermore
An efficient palladium or nickel‐catalyzed C(sp2)−P bond formation proceeds with excellent yields under mild conditions. Direct conversion of phenol to aryl phosphonates in a single pot has been developed. Broad functional group compatibility enables the economical preparation of organophosphorus compounds.
Herein, NiCl2 was employed as a cheap precatalyst in the formation of C(sp2)-P bond via cross coupling reaction of phenol derivates and phosphine oxides/phosphites. This method allows a variety of phenols with diverse functional groups to transform to phosphates with good yields. No additional additive was used in this reaction.