申请人:Ma Deyin
公开号:US20120296099A1
公开(公告)日:2012-11-22
A method for preparing a statin compound by lactonization is disclosed, which comprises the following step: lactonizing a compound of formula II into the compound of formula I in the presence of a strong acid catalyst and a dehydrant in a first solvent,
wherein Z represents H, ammonium, or a metal cations;
R
1
is H or C
1
-C
6
alkyl, preferably H or CH
3
,
R
2
is CH
3
, OH, CH
2
OH, CH
2
OC(O)R
3
, CH
2
OR
3
, or COOR
4
, preferably CH
3
or OH,
R
3
and R
4
are independently selected from the group consisting of H and C
1
-C
6
alkyl.
揭示了一种通过内酯化制备他汀类化合物的方法,包括以下步骤:在第一溶剂中,在强酸催化剂和脱水剂的存在下,将化合物II内酯化为化合物I,其中Z代表H、铵离子或金属阳离子;R1为H或C1-C6烷基,优选H或CH3;R2为CH3、OH、CH2OH、CH2OC(O)R3、CH2OR3或COOR4,优选CH3或OH;R3和R4分别独立地选自H和C1-C6烷基的群。