S. Perrin et al., REACTION OF AN OPEN-CHAIN ANALOG OF REISSERT COMPOUND HYDROFLUOROBORATE SALT WITH ETHYL ACRYLATE - A REINVESTIGATION, Tetrahedron letters, 39(13), 1998, pp. 1753-1754
The reaction of an open-chain analogue of Reissert compound hydrofluor
oborate salt with ethyl acrylate does not give a [4+2] cycloadduct as
previously described, but a [3+2] cycloadduct which evolves to a 2-pyr
idone 15. (C) 1998 Published by Elsevier Science Ltd. All rights reser
ved.