other squarates, other alkenyllithium compounds, other 2-lithioallylamines, multistep reaction, 1.) THF, pentane, 1 h, 2.) THF, pentane, -78 deg C -> room temperature; Mechanism;

in diethyl ether

sec.-butyllithium in tetrahydrofuran; cyclohexane T=-40°C; 1.16667 - 3 h; Product distribution / selectivity;

1: diethyl ether 2: (i) BH3, THF, (ii) aq. H2O2, NaOH View Scheme