| 摘要 |
Title cpds. ar eof formula: (where R1, R2 and R3 are lower alkyl, n is 1 or 2, -A-B- is CHCH2- or C=CH-, X is OH (opt. esterified or etherified), and Y is H or X and Y is = 0, or when R2 is in the alpha-position and R3O is in the beta-position, R1, R2, R3 n and A-B are as above, X may be acyl or alkyl (opt. substd. by phenyl). They are prepd. by cyclisation of corresp. dialkoxybutyl-tetrahydro-indane-1, 5-diones with an acid catalyst. |
