1: 2-bromo-[1,1,1,2,3,3,3-2H7]propane With magnesium in tetrahydrofuran T=-20°C; Metallation; 1 h; 2: carbon dioxide in tetrahydrofuran T=-70 - 20°C; Carboxylation;

in various solvent(s) 48 h; Carabid beetle, Scarites subterraneus;