Synthetic Access to All Four Stereoisomers of Oxetin
作者:Ahmad F. Kassir、Sherif S. Ragab、Thao A. M. Nguyen、Florence Charnay-Pouget、Régis Guillot、Marie-Christine Scherrmann、Thomas Boddaert、David J. Aitken
DOI:10.1021/acs.joc.6b01795
日期:2016.10.21
3-amino-2-oxetanecarboxylic acid (oxetin) is described. The oxetane core is built using a Paternò–Büchi photochemical [2 + 2] cycloaddition; from the key intermediates, complementary resolution protocols provide access to enantiomerically pure oxetin and epi-oxetin on gram-scale.
Oxetin (1a), a unique antibiotic having an oxetane ring, and its three stereoisomers (1b, 1c, and 1d) were synthesized from the known aldehyde (6) by utilizing a highly regio- and stereoselective epoxide ring-opening reaction. The biological activities of these oxetin stereoisomers were compared.