... (29) Vilsmaier, E. 'IUPAC Organic Sulfur Chemistry”; Friedlina, R. (30) Wasserman, H. H.; Dion, R. P. Tetrahedron Lett. 1982,23,1413. Page 3. 4322 J. Org. Chem., Vol. 48, No. 23, 1983 ... z 51 2 i 4 .L E rl ?- 4 m OOOO o ON ?- ?- 0 0 0 0 0 0 h N 00 0 m - ? ?- 4 3: ." 9 F zu w, k4 3: ...