Chemoenzymic preparation of asymmetrized tris(hydroxymethyl)methane (THYM*) and of asymmetrized bis(hydroxymethyl)acetaldehyde (BHYMA*) as new highly versatile chiral building blocks
摘要:
A series of asymmetrized tris(hydroxymethyl)methanes 2 and bis(hydroxymethyl)acetaldehydes 3 have been prepared in both enantiomeric forms through a chemoenzymatic methodology. The key step is the highly enantioselective PPL-catalyzed monohydrolysis of 2(E)-alkenyl-1,3-diacetoxypropanes 25-27. A careful study on the effect of unsaturations adjacent to the prochiral center in a series of 2-substituted 1,3-diacetoxypropanes has confirmed the suggested beneficial effect of a pi-system in that position but has also unveiled an unprecedented dramatic effect of double-bond configuration on enantioselectivity. A new empirical model for the interpretation of these and other results, based both on polarity and steric arguments, is proposed. This study provides a general protocol for the efficient synthesis of asymmetrized 1,3-propanediols bearing in position 2 saturated or unsaturated carbon chains.
[EN] COMPOUNDS AND METHODS FOR THE TREATMENT OF OCULAR DISORDERS<br/>[FR] COMPOSÉS ET PROCÉDÉS POUR LE TRAITEMENT DE TROUBLES OCULAIRES
申请人:AZURA OPHTHALMICS LTD
公开号:WO2020212755A1
公开(公告)日:2020-10-22
Described herein are compositions and methods for the treatment of ocular surface disorders including meibomian gland dysfunction, blepharitis, dry eye disease and other inflammatory and/or infectious disease of the anterior surface of the eye. Said compositions and methods comprise keratolytic conjugates which demonstrate keratolytic activity, and anti- inflammatory or other desirable activities. Topical administration of said compositions to the eyelid margin or surrounding areas provides therapeutic benefit to patients suffering from ocular surface disorders.
[EN] LIPIDS AND LIPID COMPOSITIONS FOR THE DELIVERY OF ACTIVE AGENTS<br/>[FR] LIPIDES ET COMPOSITIONS LIPIDIQUES POUR LE LARGAGE D'AGENTS ACTIFS
申请人:NOVARTIS AG
公开号:WO2015095340A1
公开(公告)日:2015-06-25
This invention provides for a compound of formula (I): or a pharmaceutically acceptable salt thereof, wherein R1-R4, n and p are defined herein. The compounds of formula (I) and pharmaceutically acceptable salts thereof are cationic lipids useful in the delivery of biologically active agents to cells and tissues.
Compounds and methods for the treatment of ocular disorders
申请人:Azura Ophthalmics Ltd.
公开号:US10875845B2
公开(公告)日:2020-12-29
Described herein are compositions and methods for the treatment of ocular surface disorders including meibomian gland dysfunction, blepharitis, dry eye disease and other inflammatory and/or infectious disease of the anterior surface of the eye. Said compositions and methods comprise keratolytic conjugates which demonstrate keratolytic activity, and anti-inflammatory or other desirable activities. Topical administration of said compositions to the eyelid margin or surrounding areas provides therapeutic benefit to patients suffering from ocular surface disorders.
The present invention relates to a fused heterocyclic compound having the Formula 1, which is useful as a platelet aggregation inhibitor, a method for preparing the same, and a pharmaceutical composition for inhibiting platelet aggregation comprising the same.