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
Ring-Closing Metathesis Strategies to Cyclic Sulfamide Peptidomimetics
作者:Joseph M Dougherty、Donald A Probst、Randall E Robinson、Joel D Moore、Thomas A Klein、Kelley A Snelgrove、Paul R Hanson
DOI:10.1016/s0040-4020(00)00885-1
日期:2000.12
sulfamides and sulfonyl carbamates to generate both symmetric and unsymmetric cyclic sulfamides. Two strategies are revealed, one centers on the RCM reaction of allylated sulfamides 9a–e to generate the C2-symmetric cyclic sulfamides 4a–e in high yields. A second RCM strategy utilizes the known sulfonyl carbamate 15 to prepare unsymmetric cyclic sulfamides 16 and 6 in two four-step sequences. Overall
Amino acid-derived, 7-membered cyclic sulfamides and methods of synthesizing the same
申请人:University of Kansas
公开号:US06359129B1
公开(公告)日:2002-03-19
New sulfamide compounds and methods of forming those compounds are provided. The inventive methods comprise subjecting a template opened-ring sulfamide compound to a ring-closing metathesis reaction in the presence of a Grubbs catalyst to yield a heterocyclic sulfamide. Advantageously, the template structures can be provided with a wide array of functional groups (e.g., substituted and unsubstituted amino acid side chains, peptides) chosen to provide particular properties to the compound. The preferred heterocyclic sulfamides are represented by a formula selected from the group consisting of
GRAPHICAL ABSTRACT ABSTRACT An improved environmentally benign method for synthesis of sulfamides under focused ultrasound irradiation and under solvent-free and catalyst-free conditions has been carried out by the reaction of amines or amino esters with sulfuryl chloride. This approach allows the synthesis of products in excellent yields and in short reaction time.
New chiral sulfahydantoins have been synthesized via alkaline cyclisation, starting from symetric sulfamide derivatives of natural amino acids. Tetraacetyl ribofuranose was used in the glycosylation step in order to obtain the pseudonucleosides in beta-anomeric configuration.