A scalable synthesis of calix[n]furan[4-n]pyrroles and their fully reduced analogues, the novel calix[n]tetrahydrofuran[4-n]pyrrolidines obtained by hydrogenation of their aromatic relatives, was developed and optimized. The hydrogenation reaction was studied at several selected pressures (P = 100, 50 and 15 bars) and high diastereoselectivity was observed for the four possible calix[n]tetrahydrof