in tetrahydrofuran byproducts: N2; addn. of the isocyanide to the Re compd. in THF and stirring for 2 h at room temp.; filtn., concn. (vac.), addn. of CH2Cl2 or THF followed by Et2O, filtn., washing with Et2O and drying in vac.; elem. anal.;

in tetrahydrofuran byproducts: N2; excess isocyanide, room temp.;