The present invention relates to the compounds of general formula (I)
wherein R, R
1
, R
2
are as defined in claim
1.
Compounds of formula (I) are particularly useful for preparing 3,3-dimethyl-5-formyl-2,3-dihydrobenzoxepines derivatives.
本发明涉及一般式(I)的化合物,其中R,R1,R2如权利要求书所定义。公式(I)的化合物特别适用于制备3,3-二
甲基-5-
甲醛基-
2,3-二氢苯并呋喃衍
生物。