A convenient process for producing a compound represented by general formula (2) by the catalytic hydrogenolysis of a compound represented by general formula (1) or (3) in the presence of a base, wherein R represents hydrogen or C₁-C₄ alkyl; and X represents chlorine or bromine. The obtained compound can be used as an intermediate for producing medicines.
一种在碱存在下通过通式(1)或(3)代表的化合物的催化氢解生产通式(2)代表的化合物的简便工艺,其中 R 代表氢或 C₁-C₄烷基;X 代表氯或溴。得到的化合物可用作生产药物的中间体。
US5780669A
申请人:——
公开号:US5780669A
公开(公告)日:1998-07-14
Selective dehalogenation process
申请人:Daiichi Pharmaceutical Co., Ltd.
公开号:US05780669A1
公开(公告)日:1998-07-14
A compound represented by the following formula (1) or (3): ##STR1## is subjected to a catalytic hydrogenolysis reaction in the presence of a base and thus a compound represented by the following formula (2): ##STR2## wherein R represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms and X represents a chlorine atom or a bromine atom; is easily produced. This compound is usable as an intermediate for the preparation of drugs.