Hydroxyamides are synthesized from esters. A process of making hydroxyalkyl amides comprises: reacting an ester with a hydroxyalkyl amine having the formula H
2
N—R
3
—OH wherein R
3
is a substituted or unsubstituted C2 to C5 alkyl, in the presence of a catalyst in an anhydrous solution to form the hydroxyalkyl amides. Monomers suitable for formation of polymeric articles can utilize these hydroxyamides.
[EN] METHOD FOR PRODUCING N-RETINOYLCYSTEIC ACID ALKYL ESTER<br/>[FR] PROCÉDÉ DE PRODUCTION D'ESTER ALKYLIQUE DE L'ACIDE N-RÉTINOYLCYSTÉIQUE
申请人:ARDENIA INVESTMENTS LTD
公开号:WO2017099662A1
公开(公告)日:2017-06-15
A method for producing derivatives of N-retinoylaminoalkane sulfonic acid, the method comprising providing retinoic acid, chloroformate, aminoalkanesulfonic acid selected from the group consisting of cysteic acidand alkyl ester thereof, cysteinesulfinic acid and alkyl ester thereof, homocysteic acid and alkyl ester thereof, homocysteinesulfinic acid and alkyl esters thereof, taurine and derivatives thereof, and an organic solvent,and a base, mixing said components under substantial absence of oxidizing compoundsthereby forming a reaction mixture comprising a liquid phase, wherein the liquid phase is one phaseand the derivatives of N-retinoylaminoalkane sulfonic acid are formed in said liquid phase.
AMINO ACID-BASED POLYMERIZABLE COMPOUNDS AND OPHTHALMIC DEVICES PREPARED THEREFROM
申请人:Johnson & Johnson Vision Care, Inc.
公开号:US20210388142A1
公开(公告)日:2021-12-16
Provided are amino acid based polymerizable compounds and their applications in ophthalmic devices. The amino acid based polymerizable compounds are of formula I:
wherein R, R
1
, and R
2
are as described herein.