Toward the development of chemoprevention agents. Part 1: Design, synthesis, and anti-inflammatory activities of a new class of 2,5-disubstituted-dioxacycloalkanes
A newclass of 2,5-disubstituted-dioxacycloalkanes were designed and synthesized via stereoselective synthetic method as cancer chemoprevention agents. The anti-inflammatory activities of these compounds were tested using the xylene-induced mouse ear edema model. Some of these compounds exhibited comparable or better anti-inflammatory activities than that of aspirin suggesting that they can be further
INDUCTION OF ALPHA HELIX CONFORMATIONS IN PROTEINS AND PEPTIDES
申请人:Schmalz Hans-Günther
公开号:US20120172402A1
公开(公告)日:2012-07-05
Substituted tricyclic diproline analogues of the formula (I):
wherein the variables are as defined herein. Also disclosed are methods for the production thereof, the use thereof for the induction of an alpha-helix conformation in peptides and/or proteins, pharmaceuticals containing said compounds, methods for the production of a peptide library containing said compounds, and peptide libraries containing said compounds.
Alkylidene acetoacetamides are useful building blocks for the preparation of a number of biologically active derivatives, including dehydro-β-amino-acid-containing peptidomimetics. A one-pot two-step protocol for the preparation of amino-acid-derived unsaturated acetoacetamides has been optimized. The use of microwave activation avoids, or at least decreases, the need for catalysts in both steps. A
Cyclosulfamides as Constraint Dipeptides: The Synthesis and Structure of Chiral Substituted 1,2,5-Thiadiazolidine 1,1-Dioxides: Evaluation of the Toxicity
A general synthesis for the preparation of chiral N-N′ substituted 1,2,5-thiadiazolidine 1,1-dioxides has been developed beginning with proteogenic amino acid, sulfuryl chloride, and dibromoethane. The selected chemistry and spectral properties of these compounds are examined. Overall, routes described are applicable to the synthesis of a variety of constrained dipeptidal sulfamides representing novel
Reversible Diastereoselective Photocyclization of Phenylglyoxylamides of α-Amino Acid Methyl Esters to 3-Hydroxy β-Lactams
作者:Axel G. Griesbeck、Heike Heckroth
DOI:10.1055/s-2002-19335
日期:——
from enantiomerically pure (1b-l) α-amino acid methyl esters in high yields and irradiated in acetonitrile solutions with λ = 300 nm to give the β-lactams 2a-m as photocyclization products in moderate (38 and 40% for 2j and 2k) to excellent yields (85-100%) as racemic mixtures. The photocyclization is completely reversible in the absence of trace amounts of acid and the diastereoselectivity of the lactam