Overcoming Selectivity Issues in Reversible Catalysis: A Transfer Hydrocyanation Exhibiting High Kinetic Control
作者:Benjamin N. Bhawal、Julia C. Reisenbauer、Christian Ehinger、Bill Morandi
DOI:10.1021/jacs.0c03184
日期:2020.6.24
Reversible catalytic reactions operate under thermodynamic control and thus establishing a selective catalytic system poses a considerable challenge. Herein, we report a reversible transfer hydrocyanation protocol that exhibits high selectivity for the thermodynamically less favorable branched isomer. Selectivity is achieved by exploiting the lower barrier for C-CN oxidative addition and reductive elimination
[EN] METHODS AND SYSTEMS FOR PREPARING IRREVERSIBLE INHIBITORS OF PROTEIN TYROSINE PHOSPHATASES<br/>[FR] PROCÉDÉS ET SYSTÈMES POUR PRÉPARER DES INHIBITEURS IRRÉVERSIBLES DE PROTÉINES TYROSINES PHOSPHATASES
申请人:UNIV ALBERTA
公开号:WO2011106898A1
公开(公告)日:2011-09-09
Described herein are the preparation and use of novel bromo- phosphonomethylphenylalanine amino acid derivatives (BrPmp) and BrPmp-containing peptides as specific, irreversible protein tyrosine phosphatase inhibitors, which are suitable for application in peptide synthesis. These derivatives are particularly advantageous since their synthesis is both easy and scalable, and they are suitable for peptide synthesis. The BrPmp derivatives described herein can be appropriately protected to allow for solid phase peptide synthesis (SPPS) and incorporation into peptides for preparation of protein tyrosine phosphatase inhibitors and inhibitor libraries. The peptides and peptide libraries can be used to identify new protein tyrosine phosphatase specific sequences and profile protein tyrosine phosphatase activity in cell lysates, diagnostic samples and biopsy samples.
A study of the development of reaction conditions for implementation of an activated Ullmann diaryl ethercondensation reaction that may be conducted without amino acid racemization and that has proven suitable for incorporation of a selectively-protected catechol is described and its application to the synthesis of l,l-isodityrosine (1) is detailed.
Process for the production of C-substituted diethylenetriamines
申请人:Schering Aktiengesellschaft
公开号:US05654467A1
公开(公告)日:1997-08-05
The invention relates to a process for the production of C-substituted diethylenetriamines of general formula ##STR1## in which R.sup.1, R.sup.2, R.sup.3 and R.sup.4 have different meanings.
Enzyme peptide synthesis by an iterative procedure in a nucleophile pool
作者:D.D. Petkov、I.B. Stoineva
DOI:10.1016/0040-4039(84)80122-7
日期:1984.1
An effective method for enzyme solubility-controlled synthesis of peptides, consisting in an iterative addition of equivalent amounts of acyl and amine components to a solution (nucleophilepool) containing the enzyme and a large excess of the amine component, is described.