申请人:Frutos Rogelio
公开号:US20100222585A1
公开(公告)日:2010-09-02
The invention relates to improved methods of preparing dihydrothienopyrimidines of formula 1, and intermediates thereof, (I) wherein X is SO or SO
2
, preferably SO, and wherein R
A
, R
1
, R
2
, R
3
, R
4
and R
5
have the meanings given in the description. The methods according to this invention are more suitable for large-scale synthesis of said pounds than prior methods because the new synthetic process avoids distillation and chromatographic purification between steps and results in a higher overall yield of the desired product.
本发明涉及改进的制备式1的二氢噻唑嘧啶化合物及其中间体的方法,其中X为SO或SO2,优选为SO,RA、R1、R2、R3、R4和R5具有所述描述中给出的含义。本发明的方法比先前的方法更适用于大规模合成所述化合物,因为新的合成过程避免了蒸馏和色谱纯化步骤,从而得到所需产物的总收率更高。