METHOD FOR PRODUCING ALPHA-ACYLOXYCARBONYL COMPOUND AND NOVEL ALPHA-ACYLOXYCARBONYL COMPOUND
申请人:Ishihara Kazuaki
公开号:US20120323014A1
公开(公告)日:2012-12-20
A method for producing an α-acyloxycarbonyl compound of the present invention includes performing an intermolecular reaction between a carboxylic acid and a carbonyl compound selected from the group consisting of ketones, aldehydes, and esters, which have a hydrogen atom at the α-position, using a hydroperoxide as an oxidizer and an iodide salt as a catalyst precursor, thereby introducing an acyloxy group derived from the carboxylic acid into the α-position of the carbonyl compound.
Catalytic Cross-Coupling of Alkylzinc Halides with α-Chloroketones
作者:Chrysa F. Malosh、Joseph M. Ready
DOI:10.1021/ja0467768
日期:2004.8.1
this method, primary and secondary alkyl groups are introduced adjacent to a ketone carbonyl under mild reaction conditions and in good yield. Cyclic, acyclic, aromatic, and aliphatic α-chloroketones are suitable substrates. Opticallyactive α-chloroketones are converted to opticallyactive products. The reaction was found to proceed stereospecifically with inversion of stereochemistry. The reaction
Direct Catalytic Asymmetric Mannich Reactions for the Construction of Quaternary Carbon Stereocenters
作者:Barry M. Trost、Tanguy Saget、Chao-I (Joey) Hung
DOI:10.1021/jacs.6b01187
日期:2016.3.23
Mannich reaction using α-branched ketones as nucleophilic partners for the direct enantio- and diastereoselective construction of quaternary carbon stereocenters. The reaction can be run on a gram-scale with a low catalyst loading without impacting its efficiency. Moreover, the Mannich adducts can be further elaborated with complete diastereocontrol to access molecules possessing complex stereotriads.
B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub>-Catalyzed Highly Stereoselective Hydrogenation of Unfunctionalized Tetrasubstituted Olefins
作者:Yun Dai、Xiangqing Feng、Haifeng Du
DOI:10.1021/acs.orglett.9b02512
日期:2019.9.6
A metal-free hydrogenation of unfunctionalized tetrasubstituted olefins were successfully realized using a combination of B(C6F5)3 and Ph2NMe catalyst. The corresponding products were afforded in 58-98% yields with up to >99:1 cis/trans selectivity.
novel indene-derived retinoicacidreceptor α (RARα) agonists have been designed and synthesized. The use of receptor binding, cell proliferation and cell differentiation assays demonstrated that most of these compounds exhibited moderate RARα binding activity and potent antiproliferative activity. In particular, 4-((3-isopropoxy-2,3-dihydro-1H-inden-5-yl)-carbamoyl)benzoic acid (36d), which showed