Facile Synthesis of 4H-1,2,4-Benzothiadiazine-1,1-dioxides
摘要:
[image omitted] o-Bromoarylsulfonylated amidines prepared either by acylation of amidine with o-bromoarylsulfonyl chloride or through the reaction of o-bromoarylsulfoamide with lactime ether underwent Cu(I)-catalyzed intramolecular cyclization to give 4H-1,2,4-benzothiadiazine-1,1-dioxides in good yield. By varying substituents on arylsulfonyl moieties, amidines, and lactime ethers, a small library of structurally diverse 4H-1,2,4-benzothiadiazine-1,1-dioxide derivatives was prepared.
Synthesis and antihyperglycemic evaluation of new 2,4-thiazolidinediones having biodynamic aryl sulfonylurea moieties
作者:Dhanaji V. Jawale、Umesh R. Pratap、Neha Rahuja、Arvind K. Srivastava、Ramrao A. Mane
DOI:10.1016/j.bmcl.2011.10.110
日期:2012.1
New 2,4-thiazolidinediones with aryl sulfonylurea moieties 8a–h have been synthesized by condensing various substituted sulfonamides and 5-(isocyanatomethyl) thiazolidino-2,4-dione 6. The isocyanomethyl thiazolidinedione was obtained by using the Curtius rearrangement, starting from known 2,4-dioxo-5-thiazolidineacetic acid 4. The newly synthesized compounds 8a–h have been evaluated for the antihyperglycemic