Combination of tert-Butoxycarbonyl and Triphenylphosphonium Protecting Groups in the Synthesis of Substituted Hydrazines
摘要:
[GRAPHICS]A new reagent for the systematic synthesis of substituted hydrazines is reported. Unlike previously developed reagents, this one contains only two protecting groups, thus providing a faster approach to multisubstituted derivatives. The selective introduction of alkyl and acyl groups is illustrated by a few examples, Also a new fast method for the deprotection of the triphenylphosphonium group is presented.
Combining the Petasis 3-Component Reaction with Multiple Modes of Cyclization: A Build/Couple/Pair Strategy for the Synthesis of Densely Functionalized Small Molecules
作者:Thomas Flagstad、Mette R. Hansen、Sebastian T. Le Quement、Michael Givskov、Thomas E. Nielsen
DOI:10.1021/co500091f
日期:2015.1.12
strategy for the synthesis of complex and densely functionalized smallmolecules is presented. The strategy relies on synthetically tractable building blocks (build), that is, diversely substituted hydrazides, α-hydroxy aldehydes, and boronic acids, which undergo Petasis 3-component reactions (couple) to afford densely functionalized anti-hydrazido alcohols. The resulting scaffolds can subsequently
Novel heterocyclic compounds, method for preparing same and use thereof as medicines, in particular as antibacterial agents
申请人:Aszodi Joseph
公开号:US20050245505A1
公开(公告)日:2005-11-03
The invention relates to new heterocyclic compounds of general formula (I), and their salts with a base or an acid:
The invention also relates to a process for the preparation of these compounds, as well as their use as medicaments, in particular as anti-bacterial agents.
The present invention relates to a pyrrolidine compound and pharmaceutically acceptable esters and/or salts thereof. The compounds are useful as inhibitors of metalloproteases, e.g. zinc proteases, particularly zinc hydrolases, and which are effective in treating disease states are associated with vasoconstriction of increasing occurrences.
A short and diastereoselective synthesis of newly reported aza-diketopiperazine (aza-DKP) scaffolds starting from amino-acids was achieved using domino Rh(i)-catalyzed cyclohydrocarbonylation/addition.
A compound comprising a substituent of the formula (II) is disclosed as an HIV protease inhibitor. Intermediates for making such compounds and processes for making such intermediates are also disclosed.