Perkin communications. Acid-catalysed rearrangement of the Diels–Alder adducts of activated quinones
作者:Francisco Fariña、M. Carmen Paredes、Jaime A. Valderrama
DOI:10.1039/p19900002345
日期:——
The Diels–Alderadducts (1)–(5) in the presence of the hydrochloric acid undergo a 4a,5 carbon–carbon bond fission to give rearranged compounds of type (9), (10), or the dihydrobenzofurans (11)–(14). Compound (16), obtained by hydrolysis of the adduct (15), rearranges to (17) in the presence of ethanol and silica gel.