1: With titanium tetrachloride in dichloromethane T=20°C; 0.5 h; Cooling with iceInert atmosphere; 2: With triethylsilane in dichloromethane T=20°C; 2 h; Inert atmosphere;
Rapson; Robinson
Journal of the Chemical Society, 1935 , p. 1533,1543
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Quillet; Dreux
Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences, 1964 , vol. 258, p. 1259