Palladium(II)-Catalyzed Regioselective syn-Hydroarylation of Disubstituted Alkynes Using a Removable Directing Group
作者:Zhen Liu、Joseph Derosa、Keary M. Engle
DOI:10.1021/jacs.6b08818
日期:2016.10.5
A palladium(II)-catalyzed regioselective syn-hydroarylation reaction of homopropargyl amines has been developed, wherein selectivity is controlled by a cleavable bidentate directing group. Under the optimized reaction conditions, both dialkyl and alkylaryl alkyne substrates were found to undergo hydroarylation with high selectivity. The products of this reaction contain a 4,4-disubstituted homoallylic
已经开发了钯 (II) 催化的高炔丙基胺的区域选择性顺氢芳基化反应,其中选择性由可裂解的双齿导向基团控制。在优化的反应条件下,发现二烷基和烷芳基炔底物均以高选择性进行加氢芳基化。该反应的产物含有 4,4-二取代的高烯丙基胺基序,这在药物分子和其他生物活性化合物中很常见。
Iodocarbocyclization Reaction of β-Ketoesters and Alkynes
作者:José Barluenga、David Palomas、Eduardo Rubio、José M. González
DOI:10.1021/ol0710459
日期:2007.7.1
Iodocyclopentenes are formed at room temperature upon straight reaction of delta-alkynyl-beta-ketoesters with I2 for several hours. Cyclizations involving terminal and substituted (alkyl, aryl, Br, I) alkynes were accessed. Twelve examples with yields ranging from 20% up to 80% are reported (out of them eight cases are above 60%). These results present the first examples of the iodonium-promoted 5-endo-dig
Nickel-catalyzed reductive coupling of arylcarboxylic acid 2-pyridyl esters with alkyl methanesulfonates: access to alkyl aryl ketones
作者:Hang Yu、Zhong-Xia Wang
DOI:10.1039/d3ob00293d
日期:——
Alkyl aryl ketones were synthesized via a nickel-catalyzed reductive coupling reaction of arylcarboxylic acid (2-pyridyl)esters with primary and secondary alkylmethanesulfonates under mild reaction conditions. This method suits a wide range of substrates and shows good compatibility with functional groups.