ldol cascade reaction for the construction of CF3S-containing spiro-cyclopentanone–thiochromanes was developed. This convenient, one-pot cascade reaction serves as a powerful tool for the enantioselectiveconstruction of potential bioactive spiro-cyclopentanone–thiochromanes, which have one quaternarystereocentercontaining a CF3S group and threecontiguousstereocenters including one spiro all-carbon