Palladium-Catalyzed Decarboxylative Carbonylative Transformation of Benzyl Aryl Carbonates: Direct Synthesis of Aryl 2-Arylacetates
作者:Jian-Xing Xu、Xiao-Feng Wu
DOI:10.1021/acs.orglett.8b02631
日期:2018.9.21
A procedure on palladium-catalyzed decarboxylative alkoxycarbonylation of carbonates for the synthesis of aryl 2-arylacetates has been developed. A broad range of aryl 2-arylacetates were obtained in good yields under mild conditions under a carbon monoxide atmosphere. Interestingly, other alcohols can be added as nucleophiles as well, and the corresponding esters were also obtained in good yields
C–H Functionalization via Remote Hydride Elimination: Palladium Catalyzed Dehydrogenation of <i>ortho</i>-Acyl Phenols to Flavonoids
作者:Xiaomei Zhao、Jiabin Zhou、Shuying Lin、Xukang Jin、Renhua Liu
DOI:10.1021/acs.orglett.6b03652
日期:2017.3.3
Although deprotonation of electron-poor C–H bonds to carbon anions with bases has long been known and widely used in organic synthesis, the hydride elimination from electron-rich C–H bonds to carbon cations or partial carbocations for the introduction of nucleophiles is a comparatively less explored area. Here we report that the carbonyl β-C(sp3)–H bond hydrogens of ortho-acyl phenols could be substituted
Low Pressure Carbonylation of Benzyl Carbonates and Carbamates for Applications in <sup>13</sup>C Isotope Labeling and Catalytic CO<sub>2</sub> Reduction
作者:Craig S. Day、Stephanie J. Ton、Clemens Kaussler、Daniel Vrønning Hoffmann、Troels Skrydstrup
DOI:10.1002/anie.202308238
日期:2023.8.28
Herein, an oxygen atom deletion strategy via sequential Pd-catalyzed decarboxylative carbonylation of carbonates and carbamates to afford esters and amides is reported. Operating under lowpressures (near stoichiometric or substoichiometric), either 13C labeled products are accessed or a proof-of-concept that CO2 formed upon decarboxylation can be reduced in situ and reincorporated as CO is shown.
在此,报道了通过碳酸酯和氨基甲酸酯的连续 Pd 催化脱羧羰基化以提供酯和酰胺的氧原子删除策略。在低压(接近化学计量或亚化学计量)下操作,可以获取13 C 标记的产品,也可以证明脱羧时形成的 CO 2可以原位还原并重新结合为 CO。
BALD DWARD, CHEM. SCR., 1978-1979, 13, NO 2-3, 108-109