Scalable synthesis of (R,R)-N,N-dibenzyl-2-fluorocyclohexan-1-amine with CsF under hydrogen bonding phase-transfer catalysis door Vicini, AC, Alozie, D-M, Courtes, P, Roagna, G, Aubert, C, Certal, V, El-Ahmad, Y, Roy, S, Gouverneur, V