申请人:BANYU PHARMACEUTICAL CO., LTD.
公开号:EP1264836A1
公开(公告)日:2002-12-11
This invention relates to processes for the preparation of intermediates which are useful in the synthesis of compounds of the general formula
or pharmaceutically salts thereof, wherein R1 and R2 each represent an OH group, R1 is located at the 1- or 2-position, R2 is located at the 10- or 11-position, R2 is located at the 11-position when R1 is located at the 1-position, and R2 is located at the 10-position when R1 is located at the 2-position.
The compounds of the present invention have an excellent antitumor effect and are hence useful as antitumor agents in the field of medicine.
本发明涉及用于合成通式化合物或其药用盐的中间体的制备工艺。
或其药用盐,其中 R1 和 R2 各代表一个 OH 基团,R1 位于 1 位或 2 位,R2 位于 10 位或 11 位,当 R1 位于 1 位时 R2 位于 11 位,当 R1 位于 2 位时 R2 位于 10 位。
本发明的化合物具有极佳的抗肿瘤效果,因此在医药领域可用作抗肿瘤剂。