Addition of novel benzylmagnesium “ate” complexes of BnR2MgLi type to 2-(thio)pyridones and related compounds
作者:Jacek G. Sośnicki、Tomasz Idzik、Aleksandra Borzyszkowska、Emil Wróblewski、Gabriela Maciejewska、Łukasz Struk
DOI:10.1016/j.tet.2016.12.024
日期:2017.2
Novel benzylation reagents BnR2MgLi were obtained by mixing benzylmagnesium chloride (BnMgCl) and appropriate organolithiumcompounds (RLi). As BnR2MgLi complexes are more nucleophilic than the parent Grignardcompound they enabled regioselective C6-addition to electrophilic N-substituted 2-(thio)-pyridones and C4-addition to poorly reactive NH 2-(thio)pyridones in high and good yields, respectively
A Manganese-promoted direct oxidative C−P bond formation between 2-pyridones and secondary phosphine oxides has been developed. The reported protocol proceeds under mild reaction conditions, and the C3-phosphinoylation is proposed to take place under a radical process in the presence of substoichiometric amount of Mn(II).
A specific N-alkylation of 2-hydroxypyridines is achieved by reacting with organohalides under catalyst- and base-free conditions. The observed HX-facilitated conversion of pyridyl ether intermediates to 2-pyridone products may account for the success and specific N-alkylation of the reaction under the unexpectedly simple conditions. This new reaction may provide a useful alternative for the synthesis of 2-pyridones and analogous structures because of its >99% N-selectivity, relatively broad scopes of both substrates, and no mandatory use of catalysts and bases.
Novel Heterocyclic Compounds as Bromodomain Inhibitors
申请人:Liu Shuang
公开号:US20140179648A1
公开(公告)日:2014-06-26
The present disclosure relates to compounds, which are useful for inhibition of BET protein function by binding to bromodomains, and their use in therapy.