Direct Conversion of Resin-Bound Peptides to C-Terminal Esters
作者:Rushia A. Turner、Robert J. Weber、R. Scott Lokey
DOI:10.1021/ol100471k
日期:2010.4.16
A mild and effective method was developed to convert peptides immobilized on the 2-chlorotrityl and Wang resins directly to C-terminal esters. After conventional Fmoc peptide synthesis, treatment with anhydrous HCl (0.2−3 M) in a variety of alcohols was shown to produce the corresponding peptide esters in good yield and purity. Under the mildest conditions investigated, acid-sensitive protection groups
Methods of use of compounds and compounds for the treatment of disorders characterized by the cerebral deposition of amyloid are provided. Among the compounds are those of formulae I and II: ##STR1## in which R.sub.1 is preferably 2-methyl propene, 2-butene, cyclohexyl or cyclohexylmethyl; R.sub.2, R.sub.4, and R.sub.8 are each independently methyl or ethyl; R.sub.3 is preferably iso-butyl or phenyl; R.sub.5 is preferably iso-butyl; R.sub.6 is H or methyl; R.sub.7 --(Q).sub.n is preferably benzyloxycarbonyl or acetyl; Q is preferably --C(O)--; R.sub.8 is preferbly iso-butyl; R.sub.A =--(T).sub.m --(D).sub.m --R.sub.1, is which T is preferably oxygen or carbon, and D is preferably a mono-unsaturated C.sub.3-4 alkenyl being more preferred; and X is preferably an .alpha.-ketoester or .alpha.-ketoamide.
Methods for identifying compounds effective for treating
申请人:SIBIA Neurosciences, Inc.
公开号:US06153171A1
公开(公告)日:2000-11-28
Methods for identifying compounds that can be used for treatment of neurodegenerative diseases, for monitoring the progression of these diseases, and for monitoring therapeutic intervention of these diseases are provided. These methods are effected by determining the relative amount of .alpha.-sAPP and the ratio of .alpha.-sAPP to total sAPP in body fluids, tissues or in cell culture.
Carbodiimide-Mediated Amide Formation in a Two-Phase System. A High-Yield and Low-Racemization Procedure for Peptide Synthesis
作者:Guo-Jie Ho、Khateeta M. Emerson、David J. Mathre、Richard F. Shuman、Edward J. J. Grabowski
DOI:10.1021/jo00116a057
日期:1995.6
Methods of treating neurodegenerative disorders using protease inhibitors
申请人:SIBIA Neurosciences Inc.
公开号:US06051684A1
公开(公告)日:2000-04-18
Methods of use of compounds for the treatment of disorders characterized by the cerebral deposition of amyloid are provided. Among the compounds provided for use in the methods are those of the formula: ##STR1## in which R.sub.1 is preferably 2-methylpropenyl, 2-butenyl, cyclohexyl or cyclohexylmethyl; R.sub.2, R.sub.4, and R.sub.8 are each preferably independently methyl or ethyl; R.sub.3 is preferably iso-butyl or phenyl; R.sub.5 is preferably iso-butyl; R.sub.6 is preferably H or methyl; R.sub.7 --(Q).sub.n is preferably benzyloxycarbonyl or acetyl; Q is preferably --C(O)--; and X is preferably an aldehyde, .alpha.-ketoester or .alpha.-ketoamide.