Hydroxy-Directed Amidation of Carboxylic Acid Esters Using a Tantalum Alkoxide Catalyst
作者:Hiroaki Tsuji、Hisashi Yamamoto
DOI:10.1021/jacs.6b09482
日期:2016.11.2
the chemoselective synthesis of amides by using a metal-catalyzed hydroxy-directed reaction. A hydroxy group located at the β-position of an ester group promoted the activation of a carbonyl group with a tantalum alkoxide catalyst followed by amidation reactions, leading to a wide variety of β-hydroxyamides with excellent chemeselectivity. The chemoselective amidation strategy can be extended to the
FUNCTIONALIZED PHENOLIC COMPOUNDS AND POLYMERS THEREFROM
申请人:Bezwada Rao S.
公开号:US20090170927A1
公开(公告)日:2009-07-02
The present invention relates to compounds of formula I, which are functionalized phenolic compounds, and polymers formed from the same.
Ar—[O—(X)
p
—R′]
q
I
Polymers formed from the functionalized phenolics are expected to have controllable degradation profiles, enabling them to release an active component over a desired time range. The polymers are also expected to be useful in a variety of medical applications.
CATALYST FOR CONVERTING ESTER TO AMIDE USING HYDROXYL GROUP AS ORIENTATION GROUP
申请人:CHUBU UNIVERSITY EDUCATIONAL FOUNDATION
公开号:US20210070690A1
公开(公告)日:2021-03-11
Provided is a method for amidating a hydroxy ester compound at a high chemical selectivity. The amidation reaction method for a hydroxy ester compound comprises, in the presence of a catalyst containing a compound of a transition metal of the group 4 or group 5 in the periodic table, reacting at least one kind of hydroxy ester compound selected from the group consisting of an α-hydroxy ester compound, a β-hydroxy ester compound, a γ-hydroxy ester compound and a δ-hydroxy ester compound with an amino compound so as to amidate an ester group having a hydroxyl group at the α-, β-, γ- or δ-position of the hydroxy ester compound.
[EN] 1-SUBSTITUTED-3-PYRROLIDINE DERIVATIVES AS MUSCARINIC RECEPTOR ANTAGONISTS<br/>[FR] DERIVES DE 1-SUBSTITUES-3-PYRROLIDINES COMME ANTAGONISTES DE RECEPTEURS MUSCARINIQUES
申请人:RANBAXY LAB LTD
公开号:WO2004056767A1
公开(公告)日:2004-07-08
This invention generally relates to the derivatives of 1 -substituted-3 -pyrroli dines having the structure of Formula (I): The compounds of this invention can function as..muscarinic receptor antagonists, and can be used for the treatment of various diseases of the respiratory, urinary and gastrointestinal systems mediated through muscarinic receptors. The invention also relates to a process for the preparation of the compounds of the present invention. pharmaceutical compositions containing the compounds of the present invention and the methods for treating the diseases mediated through muscarinic receptors.
HYDROLYSABLE LINKERS AND CROSS-LINKERS FOR ABSORBABLE POLYMERS
申请人:Bezwada Rao S.
公开号:US20090082540A1
公开(公告)日:2009-03-26
The present invention relates to the discovery of new class of linear and multiarmed hydrolysable linkers and cross linkers for use in the synthesis of biodegradable polymers such as, polyesters, polyurethanes, polyamides, polyureas and degradable epoxy amine resin. The linear and multiarmed hydrolysable linkers of the present invention include symmetrical and/or unsymmetrical ether carboxylic acids, amines, amide diols, amine polyols and isocyanates.