The invention relates to an improved, large scale process for the preparation of compounds of formula (I) (see fig. I) wherein R is halogen atom or hydroxyl, R2 is hydrogen atom or hydroxyl, R3 and R4 are hydrogen or alkoxy having 1-6 carbon atoms.
申请公布号
CA2056979(C)
申请公布日期
1998.06.09
申请号
CA19902056979
申请日期
1990.04.18
申请人
CHINOIN GYOGYSZER - ES VEGYESZETI TERMEKEK GYARA R.T.
