Studies in Thio‐Claisen Rearrangement: Regioselective Synthesis of Thiopyrano[2,3‐<i>b</i>]pyran‐2‐ones and Thieno[2,3‐<i>b</i>]pyran‐2‐ones
作者:K. C. Majumdar、S. Sarkar、S. Ghosh
DOI:10.1081/scc-120030314
日期:2004.12.31
4‐Mercapto‐6‐methyl‐2‐pyrone was alkylated with different allylic and propargylic halides under phase transfer catalyzed condition in the presence of TBAB or BTEAC catalyst in chloroform–aqueous NaOH (1%) at room temperature. The S‐alkylated thiopyran‐2‐ones were then refluxed in quinoline or in chlorobenzene to give 4‐chloromethylthiopyrano[2,3‐b]pyran‐2‐one and 4‐hydroxymethylthiopyrano[2,3‐b]pyran‐2‐one or several
This invention provides compounds of formula I having the structure
wherein G1, G2, R1, R4, Z, n, and X are defined in the specification or a pharmaceutically acceptable salt thereof which are useful as antineoplastic agents and in the treatment of polycystic kidney disease.
Substitute pyrimidine compounds and the use thereof
申请人:BASF Aktiengesellschaft
公开号:US06342604B1
公开(公告)日:2002-01-29
The present invention relates to the use of pyrimidine compounds of the following formula:
wherein R1, R2, R3, A, B and Ar have the meanings indicated in the description. The compounds according to the invention have a high affinity for the dopamine D3 receptor and can therefore be used to treat disorders which respond to dopamine D3 ligands.