Pt(0)-Catalyzed Alkynylation of Aryl Iodides with Lithium Alkynyltriisopropoxy Borates
作者:Chang Ho Oh、V. Raghava Reddy
DOI:10.1055/s-2004-832819
日期:——
An efficient cross coupling reaction of various lithium alkynyltriiospropoxyborates with a wide array of aryl iodides was catalyzed by Pt(PPh3)4-CuI in DMF as a solvent. These cross coupling reactions are general and permit the new sp-sp2 carbon-carbon bond formation.
Novel Synthesis of Disubstituted Alkyne Using Molybdenum Catalyzed Cross-Alkyne Metathesis
作者:Naotake Kaneta、Ken Hikichi、Shin-ichi Asaka、Motokazu Uemura、Miwako Mori
DOI:10.1246/cl.1995.1055
日期:1995.11
A novel disubstitutedalkyne synthesis was developed using molybdenum catalyzed cross-alkyne metathesis by Mortreux’s catalyst [Mo(CO)6-p-ClC6H4OH]. The reaction was carried out using Mo(CO)6 (5 mol% for total amounts of alkynes) and p-ClC6H4OH (1 equiv.) in the presence of an excess amount of another alkyne (3∼11 equiv.) in refluxing toluene.
Ni-Catalyzed Regioselective Hydrocarboxylation of Alkynes with CO<sub>2</sub> by Using Simple Alcohols as Proton Sources
作者:Xueqiang Wang、Masaki Nakajima、Ruben Martin
DOI:10.1021/jacs.5b05513
日期:2015.7.22
A mild and user-friendly Ni-catalyzed regioselective hydrocarboxylation of alkynes with CO2 (1 bar) is described. This protocol is characterized by a wide scope While obviating the need for sensitive organometallic, species and by an unprecedented regioselectivity pattern using simple alcohols as proton sources.
Rh(i)-catalyzed CO gas-free cyclohydrocarbonylation of alkynes with formaldehyde to α,β-butenolides
The rhodium(I)-catalyzed reaction of alkynes with formaldehyde proceeds via the double incorporation of a carbonyl moiety from formaldehyde, resulting in a CO gas-free cyclohydrocarbonylation leading to α,β-butenolides.
Palladium-Catalyzed Intermolecular Hydroamination of Alkynes: A Dramatic Rate-Enhancement Effect of <i>o</i>-Aminophenol
作者:Tomohiro Shimada、Yoshinori Yamamoto
DOI:10.1021/ja027683y
日期:2002.10.1
The hydroamination of alkynes using o-aminophenol proceeds in very high to good yields in the presence of Pd(NO3)2 catalyst. Remarkable rate enhancement with o-aminophenol is presumably due to the chelation effect of the ortho OH group to palladium.