作者:V.K. Ahluwalia、R.S. Jolly、A.K. Tehim
DOI:10.1016/0040-4020(82)80076-8
日期:1982.1
The condensation of hydroxybenzoic acids and their methyl esters with isoprene in the presence of orthophosphoric acid gives corresponding 2,2-dimethylchromans, which can be dehydrogenated with DDQ or NBS to give the corresponding 6-carboxy-2,2-dimethylchromenes. The synthesis of β-tubaic acid, a natural compound, has also been achieved.
在正磷酸的存在下,羟基苯甲酸及其甲酯与异戊二烯的缩合反应得到相应的2,2-二甲基苯并二氢吡喃,可以将其用DDQ或NBS脱氢得到相应的6-羧基-2,2-二甲基苯并二氢吡喃。也已经实现了天然化合物β-tubaicacid的合成。