Lipase–triethylamine-mediated dynamic transesterification of a tricyclic acyloin having a latent meso-structure: a new route to optically pure oxodicyclopentadiene
HEPATITIS C VIRUS INHIBITORS AND USES THEREOF IN PREPARATION OF DRUGS
申请人:CHANGZHOU YINSHENG PHARMACEUTICAL CO., LTD.
公开号:US20170253614A1
公开(公告)日:2017-09-07
A series of hepatitis C virus (HCV) inhibitors and compositions and applications thereof in the preparation of drugs for treating chronic HCV infection. Especially, a series of compounds that are used as NS5A inhibitors, and compositions and uses thereof in the preparations of drugs.
New 4-oxa-5-hydroxypolycycloalkenones-(3) and a new method for their Production by Diels-Alder reaction of cycloalkapolyenes with 2-hydroxy-2,5-dihydrofuran-5-ones. The new and known compounds obtainable by the process of the invention are starting materials for the production of dyes, plastics, pharmaceutical products and pest control agents.
Novel substituted lactones of amino acids in all their possible stereoisomeric forms or mixtures thereof of the formula ##STR1## wherein A is a hydrocarbon chain of 1 to 10 chain members containing one or more heteroatoms and one or more unsaturations and the chain members being a mono- or polycyclic system or comprises a system of spiro or endo type and may contain one or more chiral atoms or the lactone copula can present a supplementary chirality due to the asymetric spatial configuration of the molecule make up and R is selected from the group consisting of ##STR2## wherein Z is the organic remainder of an amino acid of the formula ##STR3## Y is derived from a primary, secondary or tertiary alcohol of the formula Y--OH and B is the remainder of a heterocyclic amino acid of 3 to 6 carbon atoms of the formula ##STR4## and their preparation and their use for the resolution of amino acids.
Process for resolving amino acids using substituted lactones
申请人:Roussel Uclaf
公开号:US05136050A1
公开(公告)日:1992-08-04
Novel substituted lactones of amino acids in all their possible stereoisomeric forms or mixtures thereof of the formula ##STR1## wherein A is a hydrocarbon chain of 1 to 10 chain members containing one or more heteroatoms and one or more unsaturations and the chain members being a mono- or polycyclic system or comprises a system of spiro or endo type and may contain one or more chiral atoms or the lactone copula can present a supplementary chirality due to the asymetric spatial configuration of the molecule make up and R is selected from the group consisting of ##STR2## wherein Z is the organic remainder of an amino acid of the formula ##STR3## Y is derived from a primary, secondary or tertiary alcohol of the formula Y-OH and B is the remainder of a heterocycle amino acid of 3 to 6 carbon atoms of the formula ##STR4## and their preparation and their use for the resolution of amino acids.
Microporous polyimide sponge and method for producing the same
申请人:INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY
公开号:US10442894B2
公开(公告)日:2019-10-15
Disclosed is a net-shaped polyimide sponge. The polyimide sponge has a stack structure of nets. Also disclosed is a method for producing a polyimide sponge. The method enables the production of a polyimide sponge in a continuous process, which offers advantages for large-scale production compared to conventional methods using batch systems.