| abstract |
PURPOSE: To obtain the subject compound useful as an antioxidant, etc., in high purity and yield at a low cost by reacting an intermediate prepared from a specific dihydroxyl compound as a starting raw material with a specified compound. n CONSTITUTION: A compound expressed by formula I [R 1 to R 8 are H, alkyl, etc.; X is formula II (R 10 is alkyl or aryl), formula III, etc.] as a starting raw material is reacted with solfonyl halides, etc., to provide a compound expressed by formula IV (R' is alkyl, hydroxyl, etc.; R 11 to R 18 are same as R 1 ), which is then preferably vinylated with a base to afford a compound expressed by formula V (R 19 to R 24 are same as R 1 ). The resultant compound expressed by formula V without isolation thereof is subsequently reacted with a compound expressed by formula VI (R 9 is same as R 10 ) to provide the objective compound expressed by formula VII. n COPYRIGHT: (C)1992,JPO&Japio |