Skeletal editing of benzodithiol-3-ones for the assembly of benzo[d][1,3]oxathiin-4-ones

A novel skeletal editing of benzodithiol-3-ones via swapping from S atom to C–O entities is developed herein, which provides a robust route to assemble benzo[ d ][1,3]oxathiin-4-ones in decent yields by utilizing aldehydes as cyclization partners.