domino process;
electrophilic aromatic substitution;
Lewis acid;
Nazarov cyclization;
D O I:
10.1139/V03-203
中图分类号:
O6 [化学];
学科分类号:
0703 ;
摘要:
1,4-Dien-3-ones substituted with pendant arylethyl side chains attached at C-1 were readily prepared from substituted dihydrocinnamaldehydes. Treatment with TiCl4 at low temperature effected domino Nazarov electrocyclization - arene trapping within 5 min to give racemic benzohydrindenones in near-quantitative yield and with complete diastereoselectivity.