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
Palladium-Catalyzed Substitution and Cross-Coupling of Benzylic Fluorides
作者:George Blessley、Patrick Holden、Matthew Walker、John M. Brown、Véronique Gouverneur
DOI:10.1021/ol300977f
日期:2012.6.1
Benzylic fluorides are suitable substrates for Pd(0)-catalyzed Tsuji–Trost substitution using carbon, nitrogen, oxygen, and sulfur nucleophiles and for cross-coupling with phenylboronic acid. For the bifunctionalsubstrate 4-chlorobenzyl fluoride, fine-tuning of the reaction conditions allows for the regioselective displacement of either the chlorine or fluorine substituent. The leaving group ability
苯甲酸氟化物是使用碳,氮,氧和硫亲核试剂进行Pd(0)催化的Tsuji-Trost取代以及与苯基硼酸交叉偶联的合适底物。对于双官能底物4-氯苄基氟化物,反应条件的微调允许氯或氟取代基的区域选择性置换。的氟化物VS在替代移位其它基团的离去基团的能力是CF 3 CO 2 ≈ p -NO 2 ç 6 ħ 4 CO 2 ≈OCO 2 CH 3 >˚F> CH 3 CO 2,其排名与Pd催化下的烯丙基氟化物相似。
Palladium-catalyzed nucleophilic substitution of napht hylmethyl and 1-naphthylethyl esters
作者:Jean-Yves Legros、Jean-Claude Fiaud
DOI:10.1016/s0040-4039(00)92227-5
日期:1992.4
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.