申请人:Oregon Graduate Center for Study & Research
公开号:US04515720A1
公开(公告)日:1985-05-07
Preparation of 9-acetyl-6-hydroxy-4-methoxy-7,8,9,10-tetrahydronaphthacene-5,12-dione (the object intermediate), and precursor compounds to the object intermediate. Preparation of the object intermediate according to the invention begins from 2-(2-hydroxyethyl)-bicyclo[2.2.2]oct-5-ene, wherein the latter is converted to 6-acetyl-4a,5,6,7,8,8a-hexahydro-1(4H) naphthalenone (one of the two precursor compounds) which is subsequently reacted with a phenylsulfonyl isobenzofuranone to furnish, regiospecifically, 9-acetyl-5,12-dihydroxy-4-methoxy-6(11H)-hexahydronaphthacenone (the other of the two precursor compounds). Heating the hexahydronaphthacenone in dimethylforamide under an oxygen atmosphere gives the object intermediate.
制备9-乙酰基-6-羟基-4-甲氧基-7,8,9,10-四氢萘并[1,2-b:5,6-b']二吡喃-5,12-二酮(目标中间体)及其前体化合物。根据本发明制备目标中间体的方法从2-(2-羟乙基)-双环[2.2.2]辛-5-烯开始,将其转化为6-乙酰基-4a,5,6,7,8,8a-六氢-1(4H)-萘酮(两个前体化合物之一),随后与苯基磺酰异苯并呋喃酮反应,以得到9-乙酰基-5,12-二羟基-4-甲氧基-6(11H)-六氢萘并酮(另一个前体化合物)。在二甲基甲酰胺中,用氧气气氛加热六氢萘并酮,即可得到目标中间体。