This disclosure describes 3-triphenylmethoxy-1-alkynes, 3-triphenylmethoxy-1-trans-alkenyl-dialkyl-alanes, and lithium 3-triphenylmethoxy-1-trans-alkenyl-dialkyl alanates useful as intermediates for the preparation of certain 11-hydroxy- and 11-deoxy-9-keto(or hydroxy)-prostanoic acid derivatives which possess bronchodilator, hypotensive, and anti-ulcer activity.
This disclosure describes 2-substituted-3,4-epoxy-cyclopentan-1-ones, 2-substituted-3,4-epoxycyclopentan-1-ols, and various 2-substituted-cyclopentenones useful as intermediates for the preparation of certain 11-hydroxy- and 11-deoxy-9-keto(or hydroxy)-prostanoic acid derivatives which possess bronchodilator, hypotensive, and anti-ulcer activity.
This disclosure describes certain 11-hydroxy and 11-deoxy-9-keto (or hydroxy)prostanoic acid derivatives useful as bronchodilators, anti-ulcer agents, or as intermediates.
Synthesis and biological evaluation of sulfur-containing shikonin oxime derivatives as potential antineoplastic agents
作者:Guang Huang、Hui-Ran Zhao、Qing-Qing Meng、Qi-Jing Zhang、Jin-Yun Dong、Bao-quan Zhu、Shao-Shun Li
DOI:10.1016/j.ejmech.2017.11.031
日期:2018.1
As a continuation of our research on developing potent and potentially safe antineoplasticagents, a set of forty five sulfur-containing shikonin oxime derivatives were synthesized and evaluated for their in vitro cytotoxic activity against human colon cancer (HCT-15), gastric carcinoma (MGC-803), liver (Bel7402), breast (MCF-7) cancer cells and human skin fibroblast (HSF) cells. All the synthesized
Stoichiometric Reactions of Acylnickel(II) Complexes with Electrophiles and the Catalytic Synthesis of Ketones
作者:Alexander C. Wotal、Ryan D. Ribson、Daniel J. Weix
DOI:10.1021/om5004682
日期:2014.10.27
While reactions with bromobenzene formed complex mixtures of ketones, reactions with α-chloroethylbenzene were highly selective for the cross-ketone product. Reactions with iodooctane and bromooctane also produced the cross-ketone product, but in intermediate yield and selectivity. In most cases the presence or absence of a chemical reductant (zinc) had only a small effect on the selectivity of the
酰基镍 (II) 配合物在形成酮的交叉亲电偶联 (XEC) 反应中具有突出的特征,但尚未系统地研究它们的反应性。我们在这里展示了我们对酰基镍 (II) 配合物与一系列碳亲电子试剂的反应性的研究。溴苯、α-氯乙苯、溴辛烷和碘辛烷与 (dtbbpy)Ni II (C(O)C 5 H 11 )(Br) ( 1b ) 和 (dtbbpy)Ni II (C(O)tolyl)(Br) 反应( 1c)形成多种有机产品。虽然与溴苯的反应形成复杂的酮混合物,但与 α-氯乙苯的反应对交叉酮产物具有高度选择性。与碘辛烷和溴辛烷的反应也产生交叉酮产物,但产率和选择性中等。在大多数情况下,化学还原剂(锌)的存在与否对反应的选择性只有很小的影响。1c与碘辛烷的偶联(产率 60%)转化为催化反应,即溴芳烃与伯溴烷烃的羰基化偶联(六个实施例,平均产率 60%)。