Copper-catalyzed methylation of 1,3-diketones with tert-butyl peroxybenzoate
作者:Zhi-Hao Zhou、Cheng-Kun Li、Shao-Fang Zhou、Adedamola Shoberu、Jian-Ping Zou
DOI:10.1016/j.tet.2017.03.058
日期:2017.5
Copper-catalyzed radical methylation of 1,3-diketones with tert-butyl peroxybenzoate in air is described, providing a general pathway to α-methyl 1,3-diketones in moderate to good yields. This protocol has been scaled up to 50 g, and one of the synthesized products can be used in the synthesis of medicine, Rosuvastatin.
Unusual Nonoctahedral Geometry with Molybdenum Oxoimido Complexes Containing η<sup>2</sup>-Pyrazolate Ligands
作者:T. Arumuganathan、Manuel Volpe、Bastian Harum、Dietmar Wurm、Ferdinand Belaj、Nadia C. Mösch-Zanetti
DOI:10.1021/ic201308g
日期:2012.1.2
around the metal center is severely distorted from octahedral and might be seen as closely approaching a distortedtrigonal-prismatic geometry, which is relevant to the active site of dimethyl sulfoxide reductase in its oxidized form. The potential utility of all of the complexes 1–3 for OAT reactivity toward PMe3 at room temperature is examined, and plausible mechanistic pathways are explored by density
制备和oxoimido复合物的氧原子转移(OAT)的反应性[的MoO(N-吨-Bu)(吨-Bu 2 -4-RPZ)2 ] [其中,R = H(1),溴(2),和我(3); 据报道[ t- Bu 2 pz = 3,5-二叔丁基吡唑酸酯]。相应吡唑特配体的钾盐和的反应钼oxoimido前体,[的MoO(N-吨-Bu)氯2(DME)](DME =二甲氧基乙烷),在甲苯中,得到的复合物1 - 3以良好的收率。配合物的特征在于1 H和13 C NMR和IR光谱,质谱,元素分析和单晶X射线晶体学。固态结构揭示的是,在每种情况下,钼中心是由一个氧代,一个N-协调吨-Bu基,和两个在空间上通过它们的两个相邻的氮原子以η苛刻吡配体2的方式。金属中心周围的配位关系严重偏离八面体,可能被视为接近扭曲的三角棱柱形几何形状,这与氧化形式的二甲基亚砜还原酶的活性位有关。所有的复合物的潜在效用1 - 3用于向PME O