Acid-catalysed rearrangement of derivatives of blocked 2-oxocycloheptaneacetic acids to spiro-αβ-butenolides
Abstract
Derivatives of some blocked 2-oxocycloheptaneacetic acids have been found to rearrange on treatment with boron trifluoride etherate, acetic acid, and acetic anhydride to spiro-αβ-butenolides.