Synthesis of Indole/Benzofuran-Containing Diarylmethanes through Palladium-Catalyzed Reaction of Indolylmethyl or Benzofuranylmethyl Acetates with Boronic Acids
The palladium-catalyzed synthesis of indole/benzofuran-containing diarylmethanes starting from indolylmethyl or benzofuranylmethyl acetates with boronic acids has been investigated. The success of the reaction is influenced by the choice of precatalyst: with indolylmethyl acetates the reaction works well with [Pd(η3-C3H5)Cl]2/XPhos while with benzofuranylmethyl acetates Pd2(dba)3/XPhos is more efficient
The first highly enantioselective hydrogenation of simple indoles was developed with a Brønstedacid as an activator to form the iminium intermediate in situ, which was hydrogenated using Pd(OCOCF(3))(2)/(R)-H8-BINAP catalyst system with up to 96% ee. The present method provides an efficient route to enantioenriched 2-substituted and 2,3-disubstituted indolines.
Ga(OTf)<sub>3</sub>-Catalyzed Temperature-Controlled Regioselective Friedel–Crafts Alkylation of Trifluoromethylated 3-Indolylmethanols with 2-Substituted Indoles: Divergent Synthesis of Trifluoromethylated Unsymmetrical 3,3′-and 3,6′-Bis(indolyl)methanes
作者:Yuan Ling、Di An、Yuanyuan Zhou、Weidong Rao
DOI:10.1021/acs.orglett.9b01135
日期:2019.5.3
temperature-controlled regiodivergent alkylation of 2-substituted indoles with trifluoromethylated 3-indolylmethanols is described that provides structurally diverse unsymmetrical 3,3′- and 3,6′-bis(indolyl)methanes with a CF3-containing quaternary carbon center in good to excellent yields under mild conditions. In addition, this present protocol could be successfully extended to the synthesis of difluoromethylated
Topical compositions comprising polyolprepolymers, stem cell, and cannabinoids for skin care
申请人:Borok Jenna
公开号:US10864189B2
公开(公告)日:2020-12-15
The present invention relates to compositions and methods for the prevention and treatment of skin disorders. In particular, the application describes topical compositions and methods of treatments comprising the combined use of one or more cannabinoids, or use of an ingredient that works on the endocannabinoid system, such as but not limited to, Palmitoylethanolamide (PEA), polyolprepolymers and stem cell extract.
Aptamers that bind to natural and synthetic cannabinoids
申请人:Xiao Yi
公开号:US10907163B1
公开(公告)日:2021-02-02
The subject invention provides materials and methods for single-step detection of small molecules, e.g., natural and synthetic cannabinoids, in a sample. The subjection invention provides nucleic acids materials, e.g., aptamers (nucleic acid oligonucleotides) that can bind to natural and/or synthetic cannabinoids. The method for detecting a natural or synthetic cannabinoid in a sample comprises contacting the sample with an aptamer-based sensor selective for the natural or synthetic cannabinoid, and sensitively and rapidly detecting the natural or synthetic cannabinoid in the sample. The aptamer-based sensor comprises aptamers that can specifically binds to natural and/or synthetic cannabinoids with nanomolar dissociation constant.