@article{boitrel:hal-01469592, TITLE = {{Synthesis and X-ray characterization of a new bis-crown ether porphyrin}}, AUTHOR = {Boitrel, Bernard and Michaudet, Lydie and Richard, Philippe}, URL = {https://univ-rennes.hal.science/hal-01469592}, JOURNAL = {{Tetrahedron Letters}}, PUBLISHER = {{Elsevier}}, VOLUME = {41}, NUMBER = {43}, PAGES = {8289-8292}, YEAR = {2000}, DOI = {10.1016/S0040-4039(00)01462-3}, KEYWORDS = {crown ethers ; general synthesis ; ureas ; cofacial structure ; X-ray crystallography}, HAL_ID = {hal-01469592}, HAL_VERSION = {v1}, }