Pyrrole, pyrazole and imidazole undergo conjugate addition with α,β-unsaturated ketones in the presence of a catalytic amount of hafnium chloride at room temperature. Although the reaction of pyrrole gave 2,5-substituted C-adduct mainly, those of pyrazole and imidazole gave the corresponding N-adducts in excellent yields.
Cellulose-Supported Copper(0) Catalyst for Aza-Michael Addition
作者:K. Reddy、Nadakudity Kumar
DOI:10.1055/s-2006-949623
日期:2006.9
Cellulose-supported copper(0) efficiently catalyzes the aza-Michael reaction of N-nucleophiles, such as amines and imidazoles with α,β-unsaturated compounds to produce the corresponding β-amino compounds and N-substituted imidazoles in excellent yields. The reactions are facile and the recovered catalyst is used for several cycles with consistent activity.
[EN] NOVEL CYP17 INHIBITORS/ANTIANDROGENS<br/>[FR] NOUVEAUX INHIBITEURS DE CYP17/ANTIANDROGÈNES
申请人:ORION CORP
公开号:WO2014202827A1
公开(公告)日:2014-12-24
Compounds of formula (I), wherein R1 to R8 A, B, Z1 and Z2 are as defined in the claims and pharmaceutically acceptable salts and esters thereof are disclosed. The compounds of formula (I) possess utility as androgen receptor antagonists (inhibitors) and/or cytochrome P450 monooxygenase 17a-hydroxylase/17,20-lyase (CYP17) inhibitors. The compounds are useful as medicaments in the treatment of cancer, particularly prostate cancer, and other androgen dependent conditions and diseases where androgen antagonism is desired.
carbon-containing nucleophiles to cyclicenones. Using this conjugate addition reaction, a variety of different nucleophiles can react with a range of cyclicenones in the presence of p-toluenesulfonic acid under solvent-free ultrasound irradiation conditions affording the corresponding C–N or C–C adducts in good to excellent yields. Comparatively, performing the reaction under ultrasound irradiation gives