SmI2-mediated reductive cleavage of α-hetero substituents of α-alkyl or α-aryl ketones and lactone gave the corresponding “thermodynamic samarium enolates”. Enantioselective protonation of the samarium enolates with C2-symmetric chiral diols afforded the corresponding ketones and lactone in moderate to high enantioselectivities.
Iron(<scp>iii</scp>) chloride hexahydrate-promoted selective hydroxylation and chlorination of benzyl ketone derivatives for the construction of hetero-quaternary scaffolds
作者:Tao Chen、Rui Peng、Wenxin Hu、Fu-Min Zhang
DOI:10.1039/c6ob01733a
日期:——
A novel and tunable α-hydroxylation/α-chlorination of benzyl ketone derivatives has been developed for the construction of hetero-quaternary carbon centers by iron(III) chloride hexahydrate mediated selective transformations through the application of different oxidants, especially the crystal water in the catalyst as an OH source is firstly reported in this hydroxylation.
High enantioselectivity (up to 94% ee) has been achieved in the protonation of samarium enolates which were generated by SmI2-mediated reduction of 2-aryl-2-methoxycyclohexanones using a C2-symmetric chiral diol as a protonsource.
Haptens, immunogens, antibodies and conjugates to ketamine and its metabolites
申请人:Randox Laboratories Limited
公开号:US20030224447A1
公开(公告)日:2003-12-04
The invention provides haptens, immunogens comprising such haptens coupled to an antigenicity-conferring carrier material, conjugates comprising such haptens bonded to a labelling agent as well as, antibodies raised against such immunogens and capable of binding with ketamine and its primary metabolite, norketamine.