Abstract
Phosphine-catalyzed [2 + 4] annulation of allenoates with thiazolone-derived alkenes has been achieved under mild conditions, giving biologically important 6,7-dihydro-5H-pyrano[2,3-d]thiazole derivatives in high to excellent yields. With the use of Kwon’s phosphine as the chiral catalyst, optically active products were obtained in good yields with excellent enantioselectivities.
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