Homogeneous and Heterogeneous Pd-Catalyzed Selective C–P Activation and Transfer Hydrogenation for “Group-Substitution” Synthesis of Trivalent Phosphines
作者:Ming Lei、Xingyu Chen、Yingjie Wang、Liran Zhang、Hong Zhu、Zhiqian Wang
DOI:10.1021/acs.orglett.2c00844
日期:2022.4.22
reported. The alkyl groups were introduced by alkylation of phosphines to form phosphonium salts. The “de-arylation” of phosphonium salts was achieved by C–P activation and transfer hydrogenation with homogeneous or heterogeneous Pd (0) catalysts. With this method, a series of trivalent phosphines were prepared from commercially available triarylphosphines. A chiral monophosphine ligand could be prepared
Precatalyzed catalyst compositions, process for preparing epoxy resins
申请人:The Dow Chemical Company
公开号:US05202407A1
公开(公告)日:1993-04-13
The reaction between epoxy compounds and active hydrogen-containing compounds or anhydrides is catalyzed with a phosphine or phosphonium compound containing at least three C.sub.1 to C.sub.4 alkyl phenyl groups attached to the phosphorus atom per molecule.
Precatalyzed catalyst compositions, process for preparing resins,
申请人:The Dow Chemical Company
公开号:US05310853A1
公开(公告)日:1994-05-10
The reaction between epoxy compounds and active hydrogen-containing compounds or anhydrides is catalyzed with a phosphine or phosphonium compound containing at least three C.sub.1 to C.sub.4 alkyl phenyl groups attached to the phosphorous atom per molecule.
Precatalyzed catalyst compositions, process for preparing epoxy resins,
申请人:The Dow Chemical Company
公开号:US05360886A1
公开(公告)日:1994-11-01
The reaction between epoxy compounds and active hydrogen-containing compounds or anhydrides is catalyzed with a phosphine or phosphonium compound containing at least three C.sub.1 to C.sub.4 alkyl phenyl groups attached to the phosphorous atom per molecule.
The compounds of this invention are suitable matting agents for coatings. The compounds are amide-containing condensation products optionally comprising at least one β-hydroxyalkylamide functional group and, for example, are prepared from monomeric amides, oligomeric polyamides or polymeric polyamides bearing β-hydroxyalkylamide groups by reacting the hydroxyalkylamide bearing amide with another compound such that at least one reactive functional group other than β-hydroxyalkylamide is also present on the condensation product, and further such that 50% or more of the terminal β-hydroxyalkylamide functionality has been reacted or converted to groups containing terminal carboxylic acid groups or other reactive groups including, but not limited to, groups reactive with polymers and crosslinkers suitable for preparing epoxy, epoxy-polyester, polyester, polyester acrylic, polyester-primid, polyurethane or acrylic coatings. Other embodiments of the invention comprise the combination of the aforementioned condensation product with inorganic solids such as silicas and aluminas, and/or matte activators.