申请人:SANOFI
公开号:US20130023677A1
公开(公告)日:2013-01-24
This disclosure relates to a process for preparing 5-aminobenzofuran derivatives of general formula (I):
in which R
1
and R
2
are as defined in the description,
by treating a 5-N-alkylamidobenzofuran derivative of general formula (II):
in which R
1
, R
2
, and R
3
are as defined in the description, with a strong acid, so as to form an acid addition salt of the compound of formula (I), which salt is itself treated, if necessary, with a basic agent so as to form this compound of formula (I) in free base form.
这项披露涉及一种制备一般式(I)的5-氨基苯并呋喃衍生物的过程:其中R1和R2如描述中所定义,通过用强酸处理一般式(II)的5-N-烷基酰胺基苯并呋喃衍生物:其中R1、R2和R3如描述中所定义,以形成化合物的一般式(I)的酸加合盐,该盐本身如有必要,可用碱性试剂处理,以形成该化合物的一般式(I)的自由碱形式。