Process for manufacturing alpha1L-adrenoceptor antagonists
申请人:F. HOFFMANN-LA ROCHE AG
公开号:EP0949250A1
公开(公告)日:1999-10-13
The process is useful for making compounds of the formula I:
wherein R is hydrogen, methyl, or fluoro. Valuable intermediates in this process include:
wherein R is hydrogen, methyl, or fluoro, and L is a leaving group.
Process for manufacturing .alpha..sub. 1L-adrenoceptor antagonists
申请人:Hoffman-La Roche Inc.
公开号:US06156894A1
公开(公告)日:2000-12-05
A process is useful for making compounds of the formula: wherein R is hydro, methyl, or fluoro. Valuable intermediates in this process include: ##STR1## wherein R is hydro, methyl, or fluoro, and L is a leaving group.
A new approach for the synthesis of N-β-enaminocarbonyl 2-oxazolidinones through ring transformation reactions of uracil
作者:Yoshiaki Kitamura、Yuto Ohshima、Yuki Nagaya
DOI:10.1016/j.tetlet.2021.153554
日期:2022.1
The reaction of N1-sulfonyluracil derivatives bearing a 2-hydroxyethyl moiety at the 3-position with NaH under anhydrous conditions at room temperature affords the corresponding 2-oxazolidinone bearing the β-enaminocarbonyl moiety. These products are useful diversifiable precursors toward various β-amino acids and N-heterocyclic compounds.
在室温、无水条件下,在 3-位带有 2-羟乙基部分的N 1-磺酰尿嘧啶衍生物与 NaH 反应得到相应的带有 β-烯氨基羰基部分的 2-恶唑烷酮。这些产品是各种 β-氨基酸和N-杂环化合物的有用的多样化前体。
Conformational chirality and chiral crystallization of N-sulfonylpyrimidine derivatives
1-(1-naphthylsulfonyl)thymine (6) were prepared by the condensation reaction of silylated pyrimidine derivatives with selected sulfonyl chlorides in acetonitrile. Some members of the series showed unexpected crystal properties as a consequence of their conformational chirality in the solid state. Compounds 1 and 5 exhibited chiral crystallization, which was, in the case of 1, accompanied by the formation of racemically