| 摘要 |
NEW MATERIAL:A compound expressed by formula I [formula II represents formula III or IV; R1 represents lower alkyl; R2 represents lower alkyl, lower alkoxyalkyl, tetrahydropyranyl or formula V (R4-R6 represent lower alkyl or phenyl); R3 represents lower alkyl]. EXAMPLE:A compound expressed by formula VI. USE:A raw material for pavoninin of shark-repelling substance. PREPARATION:A compound expressed by formula VII is hydrogenated to produce a compound expressed by formula VIII, which is reacted with a compound expressed by the formula R3-CH2COY1 (Y1 represents halogen atom). Then the obtained compound is reacted with a strong base, then with a compound expressed by formula IX (Y2 represents halogen atom) and further subjected to Claisen rearrangement reaction to obtain a compound expressed by formula X, and the formula XI of this compound is reduced, and this compound is hydrolized.
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