Primary Alcohols from Terminal Olefins: Formal Anti-Markovnikov Hydration via Triple Relay Catalysis
作者:Guangbin Dong、Peili Teo、Zachary K. Wickens、Robert H. Grubbs
DOI:10.1126/science.1208685
日期:2011.9.16
create alcohols by guiding water to attack carbon-carbon bonds in the opposite sense than it normally would. Alcohol synthesis is critical to the chemical and pharmaceutical industries. The addition of water across olefins to form primary alcohols (anti-Markovnikov olefin hydration) would be a broadly useful reaction but has largely proven elusive; an indirect hydroboration/oxidation sequence requiring
Iron can catalyze head-to-head dimerization of terminal aryl alkynes to give the corresponding (E) selective conjugated enynes in high yields. A variety of substituted aryl acetylenes underwent smooth dimerization using catalytic FeCl3 and DMEDA in the presence of KOtBu.
Habermann, Anne-Kathrin; Julia, Marc; Verpeaux, Jean-Noel, Bulletin de la Societe Chimique de France, 1994, vol. 131, p. 965 - 972
作者:Habermann, Anne-Kathrin、Julia, Marc、Verpeaux, Jean-Noel、Zhang, Da
DOI:——
日期:——
Cyclic (Alkyl)amino Carbene Based Iron Catalyst for Regioselective Dimerization of Terminal Arylalkynes
作者:Mrinal Bhunia、Sumeet R. Sahoo、Gonela Vijaykumar、Debashis Adhikari、Swadhin K. Mandal
DOI:10.1021/acs.organomet.6b00703
日期:2016.11.14
[(cAAC)Fe(CO)(4)] (1) catalyzed head-to-head dimerization of terminal arylalkynes toward conjugated enynes in very high yield and high E selectivity (up to 84:16 E:Z). The protocol can be performed under extremely low catalyst loading down to 0.01 mol %, resulting in a high TON of 6500. A mechanistic pathway for arylalkyne dimerization has been proposed on the basis of a well-defined catalyst, an isolable intermediate, and quantum chemical calculations.