Montmorillonite KSF, a Mild and Efficient Catalyst for Benzodithiepination of Carbonyl Compounds
摘要:
A mild and efficient procedure for the protection of carbonyl compounds as 1,5-dihydro-3H-2,4-benzodithiepines in high yields is described by using a readily available and inexpensive KSF clay catalyst.
Imidazole derivatives, compositions containing them, methods of preparing them, including regioselective scale-up synthetic methods, and methods of using them.
咪唑衍生物,含有它们的组合物,制备它们的方法,包括选择性区域放大合成方法,以及使用它们的方法。
Alpha,beta-unsaturated esters and acids by stereoselective dehydration
申请人:Deng Xiaohu
公开号:US20060004195A1
公开(公告)日:2006-01-05
There are provided by the present invention certain pyrazole based CCK-1 receptor modulators which have the general formula:
wherein Ar is an aromatic or heteroaromatic group, X is a hydrocarbon linker, Y is a bond or hydrocarbon linker and R
1
, R
2
, R
3
, R
4
and R
5
are certain organic substituents, methods for making the same, and stereoselective dehydration methods for generally making α,β-unsaturated esters, acids and their derivatives.