Palladium-catalyzed nucleophilic substitution of napht hylmethyl and 1-naphthylethyl esters
摘要:
Sodium dimethyl malonate reacted with naphthylmethyl and 1-naphthylethyl alcohol derivatives in DMF at 20-80-degrees-C, under palladium(0) / phosphine catalysis. to give the substitution products dimethyl naphthylmethyl- and 1-naphthylethylmalonates. respectively, in good (75-83%) yield.
Oxidative Trifluoroacetoxylation of 1°, 2°, and 3° Benzylic C(sp<sup>3</sup>)–H Bond Donors Using <i>N</i>-Trifluoroacetoxyquinuclidinium Salts under Photoredox Catalysis
作者:Michael Hitt、Andrei N. Vedernikov
DOI:10.1021/acs.orglett.2c02946
日期:2022.10.28
trifluoroacetate was prepared in situ from quinuclidine N-oxide and (CF3CO)2O. Except for some electron-poor substrates, this reagent allows for the high-yielding oxidative trifluoroacetoxylation of 1°, 2°, and 3° benzylic C–H bonds under photocatalytic conditions. The trifluoroacetoxylation of an ibuprofen methyl ester allowed the selective functionalization of a 2° benzylic C–H bond. For alkylbenzenes, hydrogen-atom