One-Pot Tandem Synthesis of β-Trimethylsilyloxy Thioesters from Thioacids, Epoxides, and HMDS Catalyzed by Silica Gel Under Solvent-Free Conditions
摘要:
A procedure for one-pot preparation of beta-trimethylsilyloxy thioesters from epoxides, thioacids, and hexamethyl disilazane (HMDS) in the presence of silica gel under solvent-free condition was developed. The desired silylated products were isolated in good to excellent yields after silica-gel column chromatography.Supplemental materials are available for this article. Go to the publisher's online edition of Synthetic Communications (R) to view the free supplemental file.
Abstract Epoxide ringopening with thioacetic acid and thiobenzoic acid was investigated in the presence of water under catalyst-free conditions. This green and simple process gave an excellent yield. With simple decanting, the products were obtained in high purity and on a large scale. In this process, alkyl halide and ester cleavage were not observed.
CHROMATOGRAPHY MEMBRANES, DEVICES CONTAINING THEM, AND METHODS OF USE THEREOF
申请人:Brellisford Damian
公开号:US20170145053A1
公开(公告)日:2017-05-25
Described herein are fluid treatment devices for use in tangential flow filtration, comprising a housing unit and a composite material, wherein the composite material comprises: a support member comprising a plurality of pores extending through the support member; and a non-self-supporting macroporous cross-linked gel comprising macropores having an average size of 10 nm to 3000 nm, said macroporous gel being located in the pores of the support member. The invention also relates to a method of separating a substance from a fluid, comprising the step of placing the fluid in contact with an inventive device, thereby adsorbing or absorbing the substance to the composite material contained therein.
Latent thiol monomers and their use in the synthesis of polymers and graft copolymers are described. The latent thiol monomers comprise at least one polymerizable functional group and at least one protected thiol group. The polymers or copolymers may be used in adhesive, caulk, or mastic compositions. The copolymer may also be used as a compatiblizer for physical blends of at least two polymers.
Chromatography membranes, devices containing them, and methods of use thereof
申请人:Natrix Separations, Inc.
公开号:US10800808B2
公开(公告)日:2020-10-13
Described herein are fluid treatment devices for use in tangential flow filtration, comprising a housing unit and a composite material, wherein the composite material comprises: a support member comprising a plurality of pores extending through the support member; and a non-self-supporting macroporous cross-linked gel comprising macropores having an average size of 10 nm to 3000 nm, said macroporous gel being located in the pores of the support member. The invention also relates to a method of separating a substance from a fluid, comprising the step of placing the fluid in contact with an inventive device, thereby adsorbing or absorbing the substance to the composite material contained therein.