M. Tsukayama
Feb 1, 1977
Citations
0
Influential Citations
2
Citations
Journal
Bulletin of the Chemical Society of Japan
Abstract
Condensation of 7-hydroxy-2,2-dimethylchroman with benzoyloxyacetonitrile gave 7-hydroxy-6-benzoyl-oxyacetyl-2,2-dimethylchroman (3) which was converted into 7-hydroxy-6-acetoxyacetyl-2,2-dimethylchroman (7) in four steps. Dehydrogenation of 7 with DDQ in dried toluene afforded ripariochromene B (1). Ripariochromene B was also synthesized by oxidative cyclization of 2,4-dihydroxy-5-(3-methyl-2-butenyl)-ω-acetoxy-acetophenone (13) which was prepared from resorcinol and acetoxyacetonitrile in two steps. Ripariochromene C (2) was synthesized from resorcinol by the same method as that described above.