A series of analogues of the dipeptide sweetener L-aspartyl-L-phenylalaninemethylester having hydroxy and/or methoxy substitution on the aromatic ring was synthesized and tasted. The introduction of a methoxy group in the para position of the aromatic ring of the peptide sweetener is crucial to the reduction or destruction of the sweet taste. The effects of substituents in the ortho or meta position
PROCESSES AND REAGENTS FOR MAKING DIARYLIODONIUM SALTS
申请人:Ground Fluor Pharmaceuticals, Inc.
公开号:US20140121371A1
公开(公告)日:2014-05-01
This disclosure relates to processes and reagents for making diaryliodonium salts, which are useful for the preparation of fluorinated, iodinated, astatinated and radiofluorinated aromatic compounds.
The rules of cyclization: Alkynylamides are regioselectively cycloisomerized into piperazin‐2‐one and 1,4‐diazepan‐2‐one derivatives by using catalytic amounts of appropriate metal catalysts. A 6‐exo‐dig addition proceeds in the presence of Bi(OTf)3, while the 7‐endo‐dig addition occurs with PtCl2 for the same substrate. (see scheme; Ns=o‐nitrobenzenesulfonyl, Ts=p‐toluenesulfonyl, Cbz=benzyloxycarbonyl
The invention relates to nonadepsipeptides and methods for their preparation and their use for the production of medicaments for the treatment and/or prophylaxis of diseases, in particular bacterial infectious diseases.
Processes and reagents for making diaryliodonium salts
申请人:NUtech Ventures
公开号:US09278959B2
公开(公告)日:2016-03-08
This invention relates to processes and reagents for making diaryliodonium salts, which are useful for the preparation of fluorinated and radiofluorinated aromatic compounds.