Synthesis of Certain N,N-Disubstituted Glycines of expected Analgesic and Antinflammatory activity

N,N-Disustituted Glycines-Analgetic and Anti-inflammatory.A genera survey of the different methds of preparation of thietanes, thiazoidinones , thiazoline , thiazolidines , thiolanes. Thiomorpholinones thieno (3,4-d) oxazoles and thienopyrmidons is presented .A detaied discussin for the experimental ressuts attained with an adequate interpretation is advanced.The resent investigation invoves the synthesis of the following navaiable starting materials and intermediates.2.4 – pentadienoic acid .2.4 – pentadienoienol.2.4 – pentadienoyl acetate.1,4- dithiocyanato-2-butene.2-Methy-1,4-dithiocyanato -2- butane2,3-Dimethy 1_1,4 – dithiocyanato_2_butene.