Ugi amine-derived P,N- and P,P-ligands with N-alkyltriethoxysilyl tethers: synthesis and evaluation of mesoporous silica-supported Pd complexes in asymmetric allylic substitution reactions
摘要:
A facile approach to the synthesis of several types of chiral P,N- and P,P-ligands bearing triethoxysilyl groups starting from N,N-diemthyl-1-ferrocenylethylamine (Ugi amine) has been developed. Allyl palladium complexes of these ligands have been prepared, characterized, and grafted on mesoporous silica. The resulting silica-supported complexes have been shown to catalyze asymmetric allylic alkylation and aminations reactions with moderate enantioselectivities. (C) 2011 Elsevier Ltd. All rights reserved.
Ugi amine-derived P,N- and P,P-ligands with N-alkyltriethoxysilyl tethers: synthesis and evaluation of mesoporous silica-supported Pd complexes in asymmetric allylic substitution reactions
摘要:
A facile approach to the synthesis of several types of chiral P,N- and P,P-ligands bearing triethoxysilyl groups starting from N,N-diemthyl-1-ferrocenylethylamine (Ugi amine) has been developed. Allyl palladium complexes of these ligands have been prepared, characterized, and grafted on mesoporous silica. The resulting silica-supported complexes have been shown to catalyze asymmetric allylic alkylation and aminations reactions with moderate enantioselectivities. (C) 2011 Elsevier Ltd. All rights reserved.
SUBSTITUTED THIOPHENYL URACILS, SALTS THEREOF AND THE USE THEREOF AS HERBICIDAL AGENTS
申请人:Syngenta Crop Protection AG
公开号:US20200315174A1
公开(公告)日:2020-10-08
The invention relates to substituted thiophenyl uracils of general formula (I) or the salts (I) thereof, wherein the groups in general formula (I) are as defined in the description, and to the use thereof as herbicides, in particular for controlling weeds and/or weed grasses in crops of cultivated plants and/or as plant growth regulators for influencing the growth of crops of cultivated plants.
A Catalytic Oxidative Quinone Heterofunctionalization Method: Synthesis of Strongylophorine-26
作者:Wanwan Yu、Per Hjerrild、Kristian M. Jacobsen、Henriette N. Tobiesen、Line Clemmensen、Thomas B. Poulsen
DOI:10.1002/anie.201805580
日期:2018.7.26
functionalization with a collection of O, N, and S nucleophiles, using oxygen as the terminal oxidant. Preliminary mechanistic observations and the first synthesis of the cytotoxic natural product strongylophorine‐26 is presented.
The present invention relates to a compound represented by the following formula (1):
wherein W, X, Y, R1, R2, R33, R34, m and n are as defined in the claims, or a pharmacologically acceptable salt thereof.
An object of the present invention is to provide a cell-adhesive material for biological tissues, in which the surface of a material for biological tissues (particularly metallic material) is modified strongly with a large amount of a cell-adhesive artificial peptide (P) that retains a biological activity.
The present invention provides a cell-adhesive material for biological tissues including a cell-adhesive artificial peptide (P) and a material for biological tissues, wherein the cell-adhesive artificial peptide (P) is immobilized on the surface of the material for biological tissues through an electrochemical reaction. The cell-adhesive artificial peptide (P) is preferably a peptide (P1) that is synthesized by a genetic recombinant microorganism and has at least one cell-adhesive minimal amino acid sequence (X) in one molecule. The number of the cell-adhesive minimal amino acid sequences (X) in one molecule of the polypeptide (P1) is preferably 3 to 50.
PREPARATION METHOD FOR BENZOXAZOLEOXAZINE KETONE COMPOUND AND INTERMEDIATE AND CRYSTAL FORM THEREOF
申请人:North China Pharmaceutical New Drug R&D Co., Ltd.
公开号:EP3199536A1
公开(公告)日:2017-08-02
A preparation method for a high-purity benzoxazoleoxazine ketone compound, a crystal form thereof, and an intermediate compound for preparing a compound of formula (I), and a preparation method therefor.