基于我们的初步研究,使用开发的无碱方法,邻卤代苯甲酸甲酯与氮杂双环烯烃的环化反应可高效进行,从而以良好或优异的收率获得相应的苯并[ c ]菲啶衍生物。37个应用示例验证了本策略与不同组的兼容性,尤其是与电子缺乏的组的兼容性,这些组很难使用其他传统方法访问。另外,与非对称氮杂双环烯烃的环化反应以高区域选择性实现。
基于我们的初步研究,使用开发的无碱方法,邻卤代苯甲酸甲酯与氮杂双环烯烃的环化反应可高效进行,从而以良好或优异的收率获得相应的苯并[ c ]菲啶衍生物。37个应用示例验证了本策略与不同组的兼容性,尤其是与电子缺乏的组的兼容性,这些组很难使用其他传统方法访问。另外,与非对称氮杂双环烯烃的环化反应以高区域选择性实现。
Compounds of Formula I and Formula II are useful as inhibitors of HIF prolyl hydroxylases. Compounds of Formula I and Formula II have the following structures:
where the definitions of the variables are provided herein.
Compounds of Formula I and Formula II are useful as inhibitors of HIF prolyl hydroxylases. Compounds of Formula I and Formula II have the following structures:
where the definitions of the variables are provided herein.
Catalytic Enantioselective α-Tosyloxylation of Ketones Using Iodoaryloxazoline Catalysts: Insights on the Stereoinduction Process
作者:Audrey-Anne Guilbault、Benoit Basdevant、Vincent Wanie、Claude Y. Legault
DOI:10.1021/jo302393u
日期:2012.12.21
A family of iodooxazoline catalysts was developed to promote the iodine(III)-mediated alpha-tosyloxylation of ketone derivatives. The alpha-tosyloxy ketones produced are polyvalent chiral synthons. Through this study, we have unearthed a unique mode of stereoinduction from the chiral oxazoline moiety, where the stereogenic center alpha to the oxazoline oxygen atom is significant. Computational chemistry was used to rationalize the stereoinduction process. The catalysts presented promote currently among the best levels of activity and selectivity for this transformation. Evaluation of the scope of the reaction is presented.