in diethyl ether; acetonitrile T=0 - 20°C; Title compound not separated from byproducts.;

1: in diethyl ether; acetonitrile T=-10 - 20°C; 28 h; 2: in diethyl ether; acetonitrile T=20°C; 4 h; Further stages. Title compound not separated from byproducts.;

in diethyl ether; acetonitrile T=0 - 20°C; Title compound not separated from byproducts.;