The synthesis of isoquinolines, indoles and benzthiophen by an improved Pomeranz-Fritsch reaction, using boron trifluoride in trifluoroacetic anhydride
作者:M.J. Bevis、E.J. Forbes、N.N. Naik、B.C. Uff
DOI:10.1016/s0040-4020(01)90874-9
日期:1971.1
Pomeranz-Fritsch cyclisations are reported using a new reagent boron trifluoride-trifluoroacetic anhydride. Isoquinolines carrying 7-OMe groups have been prepared in good yields and the method extended to the formation of N-substituted indoles and of benzthiophen from the corresponding acetals. Benzofuran could not be obtained by this procedure nor could a Bischler-Napieralski type cyclisation be induced