The use of BrCCl3-PPh3 in Appel type transformations to esters, O-acyloximes, amides, and acid anhydrides
作者:Mariam Al-Azani、Mazen al-Sulaibi、Nuha al Soom、Yosef Al Jasem、Bernhard Bugenhagen、Bassam Al Hindawi、Thies Thiemann
DOI:10.1016/j.crci.2016.04.004
日期:2016.8
Abstract Esters, acyloximes, amides and acid anhydrides have been prepared from the respective carboxylic acids, oximes, amines and alcohols by the use of the reagent combination BrCCl3-PPh3. The reactions obviate the handling acyl halides or more aggressive reagents PCl3, POCl3, or SOCl2. Furthermore, the environmentally hazardous CCl4 used in Appel-type reactions is replaced with BrCCl3, a reagent
Rhodium-Catalyzed Direct Alkenylation and Arylation of Arene C−H Bonds via Decarbonylation of Cinnamoyl Chlorides, Cinnamic Anhydrides, and Poly(aroyl) Chlorides
作者:Wenjing Ye、Ning Luo、Zhengkun Yu
DOI:10.1021/om900997y
日期:2010.2.22
Efficient regioselective direct alkenylation of benzo[h]quinoline was realized with cinnamoyl chlorides as the coupling partners via decarbonylation of the chlorides and C-H bond activation by means of [Rh(CO)(2)Cl](2) as the catalyst in refluxing o-oxlene under phosphine-free conditions. For 2-phenylpridine, [Rh(CO)(2)Cl](2) or [Rh(COD)Cl](2) efficiently promoted its direct alkenylation with cinnamic anhydrides. Polyarenes were synthesized from [Rh(COD)Cl](2)-catalyzed decarbonylative poly(arylation) of isophthaloyl dichloride, terephthaloyl dichloride, or benzene-1,3,5,-tricarbonyl chloride with benzo[h] quinoline.