in tetrahydrofuran byproducts: Me3SiCl; mixt. of reagents (1:1 molar ratio) was refluxed in THF for 48 h; evolution of Me3SiCl was monitored with an indicator paper in the gas phase; evapd; resulting brown oil was identified by elem. anal. and IR spectrum;

1: 64 percent / N-bromosuccinimide / tetrahydrofuran / 4 h / 100 °C 2: 50 percent / H2O; diethyl ether View Scheme