Acetyl Bromide-Alcohols as Convenient Reaction Systems for: a) Removal ofN-tert-Boc,N-Cbz AndN-Ac Protective Groups, b) Esterifications and Transesterifications, c) Debenzylation of Aryl-O-Benzyl Ethers
摘要:
Hydrogen bromide generated in situ by the addition of acetyl bromide to alcohols is a useful reagent for esterifications and transesterifications; N-tert-Boc, N-Cbz and N-Ac deprotections; and debenzylation reactions.
Enamides Accessed from Aminothioesters via a Pd(0)-Catalyzed Decarbonylative/β-Hydride Elimination Sequence
作者:Geanna K. Min、Dácil Hernández、Anders T. Lindhardt、Troels Skrydstrup
DOI:10.1021/ol101620r
日期:2010.11.5
A facile synthesis of various enamides from aminothioesters via a palladium(0)-catalyzed decarbonylation/β-hydride elimination is reported. This protocol was applied to mercaptopyridyl C-terminal modified peptides for the generation of enamides without epimerization at stereogenic centers.
[EN] REDOX DEHYDRATION COUPLING CATALYSTS AND METHODS RELATED THERETO<br/>[FR] CATALYSEURS DE COUPLAGE DE DÉSHYDRATATION RÉDOX ET PROCÉDÉS ASSOCIÉS À CEUX-CI
申请人:UNIV EMORY
公开号:WO2017070157A1
公开(公告)日:2017-04-27
This disclosure relates to synthetic coupling methods using catalytic molecules. In certain embodiments, the catalytic molecules comprise heterocyclic thiolamide, S-acylthiosalicylamide, disulfide, selenium containing heterocycle, diselenide compound, ditelluride compound or tellurium containing heterocycle. Catalytic molecules disclosed herein are useful as catalysts in the transformation of hydroxy group containing compounds to amides, esters, ketones, and other carbon to heteroatom or carbon to carbon transformations.
Sequential One-Pot Synthesis of Dipeptides through the Transient Formation of CDI-<i>N</i>-Protected α-Aminoesters
作者:Renata Marcia de Figueiredo、Jean-Simon Suppo、Camille Midrier、Jean-Marc Campagne
DOI:10.1002/adsc.201700034
日期:2017.6.6
The synthesis of dipeptides through a sequential one‐pot procedure from commercially available protectedaminoacids is described. The transformation relies on the use of in situ generated transiently CDI‐protected α‐amino esters (CDI, e.g. N,N′‐carbonyldiimidazole). In addition of being a highly atom‐economical process, the couplings take place under very mild and neutral conditions without adding
[EN] PEPTIDIC COMPOUNDS AS CYSTEINE PROTEASE INHIBITORS<br/>[FR] COMPOSES PEPTIDIQUES EN TANT QU'INHIBITEURS DE LA PROTEASE A CYSTEINE
申请人:AXYS PHARM INC
公开号:WO2004000838A1
公开(公告)日:2003-12-31
The present invention is directed to compounds that are inhibitors of cysteine proteases, in particular, cathepsins B, K, L, F, and S and are therefore useful in treating diseases mediated by these proteases. The present invention is directed to pharmaceutical compositions comprising these compounds and processes for preparing them.
Compounds and compositions as cathepsin S inhibitors
申请人:Axys Pharmaceuticals, Inc.
公开号:US06492362B1
公开(公告)日:2002-12-10
The present invention relates to novel selective cathepsin S inhibitors, the pharmaceutically acceptable salts and N-oxides thereof, their uses as therapeutic agents and the methods of their making.