1: [1,3]dithiolane-2-carboxylic acid ethyl ester With n-butyllithium; diisopropylamine in tetrahydrofuran; hexane T=-78°C; Metallation; 0.916667 h; 2: chloro-trimethyl-silane in tetrahydrofuran; hexane T=-78 - 20°C; silylation;

1: ethyl dithiolanecarboxylate With lithium diisopropyl amide in tetrahydrofuran; hexane T=-78°C; Metallation; 0.333333 h; 2: chloro-trimethyl-silane in tetrahydrofuran; hexane T=20°C; Substitution;