The effect of the methanol pressure on the formation of carbon-carbon interlayer bonds in absence of BLG functionalization has then been considered by assessing the thermodynamic stability of diamond-like structures when exposed to high pressure (6.8 and 10 GPa) in methanol. We have performed biased MD simulations where we have promoted the formation of interlayer C-C bonds by restraining for 2.5 ps the interlayer distance (between centers of mass) to remain below 1.7 (applying semi-parabolic potentials V wall with k= 10 8 kJ/mol*nm). After few hundreds of steps we observe the formation of diamane-like structure, a single layer of diamond characterized by C 6 units in boat configuration. We find half of the BLG carbon atoms involved in C-C interlayer bonds. Once the bias is removed, the C-C interlayer bonds are broken within few femtoseconds, with consequent increase of the interlayer distance and reformation of BLG.