3-(2,4,6-trimethyl-phenyl)-5,6,7,8-tetrahydro-4H-cycloheptathiazol-3-ium perchlorate; potassium tert-butylate in 1,4-dioxane T=30 - 70°C; Stetter reaction; 22.75 h; Inert atmosphere;

sodium acetate; 5-(2-hydroxyethyl)-4-methyl-3-(phenylmethyl)thiazolium chloride in ethanol 1) 3 h, 80 deg C, 2) 12 h, reflux;

(i) nBuLi, iPr2NH, THF, hexane, (ii) CuCl2, DMF; Multistep reaction;

(i) LDA, THF, (ii) I2, (iii) aq. HCl; Multistep reaction;