8.
Sulfamic acid catalyzed solvent-free synthesis of 10-aryl-7,7-dimethyl-6,7, 8,10-tetrahydro-9H-[1,3]-dioxolo [4,5-b]xanthen-9-ones and 12-aryl-9,9-dimethyl- 8,9,10,12-tetrahydro-11H-benzo[a]xanthen-11-ones
机译:氨基磺酸催化的10-芳基-7,7-二甲基-6,7,8,10-四氢-9H- [1,3]-二氧杂环[4,5-b]黄原9-9和12-芳基-9,9-二甲基-8,9,10,12-四氢-11H-苯并[a]黄原-11-酮