Novel PdII-Mediated Cascade Carboxylative Annulation to Construct Benzo[b]furan-3-carboxylic Acids
摘要:
Benzo[b]furan-3-carboxylic acid (2) was generated from 1 by forming three new bonds in one step via a Pd-II-mediated cascade carboxylative annulation. The proposed mechanism was supported by the observation of an unusual acetylation of 1 as a side reaction together with an O-18-labeling study.
Silver Triflate Catalyzed Acetylation of Alcohols, Thiols, Phenols, and Amines
作者:Debashis Chakraborty、Rima Das
DOI:10.1055/s-0030-1259999
日期:2011.5
variety of alcohols, thiols, phenols, and amines were subjected to acetylation reaction using acetic anhydride in the presence of catalytic quantity of silver triflate. The method described has a wide range of applications, proceeds under mild conditions, does not involve cumbersome workup, and the resulting products are obtained in high yields within a reasonable time. acetylation - silver triflate -
A wide range of directing groups (ester, ketone, acetate, aryl sulfonate, triazene, carbamate) allow the regioselective directed ortho insertion (DoI) of zinc in the presence of LiCl leading to polyfunctional aryl and heteroaryl zinc reagents.