Iodine Promoted Regioselective α-Sulfenylation of Carbonyl Compounds using Dimethyl Sulfoxide as an Oxidant
作者:Yogesh Siddaraju、Kandikere Ramaiah Prabhu
DOI:10.1021/acs.orglett.6b03084
日期:2016.12.2
A metal-free regioselective sulfenylation of the α-CH3 group of ketones has been achieved in the presence of the α-CH2 or α-CH group using the cross dehydrogenative (CDC) strategy. Aldehydes also exhibit good selectivity forming the corresponding α-sulfenylated products. This efficient sulfenylation of ketones or aldehydes with thiones or heterocyclic thiols utilizes dimethyl sulfoxide (DMSO) as an
(2-Pyridyl)acetone-Promoted Cu-Catalyzed O-Arylation of Phenols with Aryl Iodides, Bromides, and Chlorides
作者:Qi Zhang、Deping Wang、Xianyang Wang、Ke Ding
DOI:10.1021/jo9012157
日期:2009.9.18
Employing (2-pyridyl)acetone as a new supporting ligand, the copper-catalyzed coupling reactions of aryl chlorides, aryl bromides, and aryl iodides with various phenols successfully proceeded in good yields under mild conditions. This reaction displays great functional groups compatibility and excellent reactive selectivity.
Unique Effect of Coordination of an Alkene Moiety in Products on Ruthenium-Catalyzed Chemoselective C−H Alkenylation
Ruthenium-catalyzed alkenylation of 2'-alkoxyacetophenones with alkenylboronates provides ortho C-H alkenylation products without sacrificing an ether functional group at the other ortho position. Both excellent chemoselectivity and high product yields are achieved with an aryloxo ruthenium complex. The effective suppression of the C-O bond cleavage was attained by coordination of the alkenyl moiety in the C-H alkenylation product to the ruthenium center.
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