Preparation of vinyl ethers using a Wittig approach, and their subsequent hydrogenation employing continuous-flow processing
作者:Monaem Balti、Mohamed Lotfi Efrit、Nicholas E. Leadbeater
DOI:10.1016/j.tetlet.2016.03.037
日期:2016.4
A methodology is reported for the preparation of various aromatic-functionalized vinylethers using a Wittig approach. The subsequent hydrogenation of the vinylether products to their saturated analogs is also performed and is streamlined by employing continuous-flow processing.
Methods for the synthesis of phenylacetaldehydes (oxidation, one-carbon chain extension) were compared by using the synthesis of 4-methoxyphenylacetaldehyde as a model example. Oxidations of 4-methoxyphenylethanol with activated DMSO (Swern oxidation) or manganese dioxide gave unsatisfactory results; whereas oxidation with 2-iodoxybenzoic acid (IBX) produced 4-methoxyphenylacetaldehyde in reasonable
Enol ethers as carbonyl surrogates in a modification of the Povarov synthesis of 3-aryl quinolines and their anti-Toxoplasma activity
作者:Carla E. Brown、James McNulty、Claudia Bordón、Robert Yolken、Lorraine Jones-Brando
DOI:10.1039/c6ob01083k
日期:——
A novel method for the preparation of 2-carboxyl-3-aryl quinoline derivatives from anilines, ethyl glyoxalate and enol ethers as phenylacetaldehyde surrogates is reported. The three-component coupling reaction occurs rapidly under mild conditions in dichloromethane catalysed by TFA. The method allows a more direct access to 3-aryl quinolines, sidestepping issues encountered with phenylacetaldehyde
Palladium-catalyzed arylation of methyl vinyl ether
作者:Anders Hallberg、Lars Westfelt、Boris Holm
DOI:10.1021/jo00339a036
日期:1981.12
Rhodium-Catalyzed Anti-Markovnikov Intermolecular Hydroalkoxylation of Terminal Acetylenes
作者:Masataka Kondo、Takuya Kochi、Fumitoshi Kakiuchi
DOI:10.1021/ja1097385
日期:2011.1.12
We report here the first transition-metal-catalyzed anti-Markovnikov intermolecular hydroalkoxylation of terminal acetylenes to give enol ethers in high yields without using bases. Arylacetylenes as well as alkenyl- and alkylacetylenes were coupled with aliphatic alcohols, and the products were obtained with high Z selectivity in most cases. Effective catalysts were 8-quinolinolato rhodium complexes, which are structurally simple but have been relatively unexplored as catalysts.