First steroidal carbamoyloxa-bridged cyclophases: Regioselective macrocylization of methyl cholate by double transesterification

Article abstract of DOI:10.1055/s-1996-4343

Facile regioselective macrocyclization of methyl cholate (1) using dimethyl α,α,α',α'-tetramethyl-m-xylylenedicarbamate (2) by transesterification was achieved, in refluxing toluene (0.004 M), using 3% of SnCl₂ and 1% of glycoluril as an additi