Tellurium/lithium exchange reactions in the synthesis of spiroketals and 1,6-dioxygenated systems
作者:Alcindo A. Dos Santos、Jefferson L. Princival、João V. Comasseto、Simone M.G. de Barros、José E. Brainer Neto
DOI:10.1016/j.tet.2007.03.178
日期:2007.6
O-dianions have been generated through concomitant acid/base and tellurium/lithium exchange reactions. The di-lithium salts were transmetallated with cerium chloride to the corresponding di-cerium salts and subsequently reacted with lactones and carboxylic acid anhydrides to yield the respective spiroketals. The di-lithium entities were also converted into the corresponding cyanocuprates that add in
Synthesis and Alkylation of Cyclic α-Sulfonimidoyl Carbanions: Non-transferable Chiral Carbanionic Ligands in Copper-Mediated Enantioselective Conjugate Addition
作者:Stephan Boßhammer
DOI:10.1055/s-1998-2071
日期:1998.6
FRASER-REID B.; HICKS D. R.; WALKER D. L.; ILEY D. E.; YUNKER M. B.; TAM +, TETRAHEDRON LETT. <TELE-AY>, 1975, NO 5, 297-300
作者:FRASER-REID B.、 HICKS D. R.、 WALKER D. L.、 ILEY D. E.、 YUNKER M. B.、 TAM +
DOI:——
日期:——
CAHIEZ G.; ALEXAKIS A.; NORMANT J. F., TETRAHEDRON LETT., 1978, NO 33, 3013-3014
作者:CAHIEZ G.、 ALEXAKIS A.、 NORMANT J. F.
DOI:——
日期:——
Fluorine-Substituted Cyclofenil Derivatives as Estrogen Receptor Ligands: Synthesis and Structure−Affinity Relationship Study of Potential Positron Emission Tomography Agents for Imaging Estrogen Receptors in Breast Cancer
作者:Jai Woong Seo、John S. Comninos、Dae Yoon Chi、Dong Wook Kim、Kathryn E. Carlson、John A. Katzenellenbogen
DOI:10.1021/jm0512037
日期:2006.4.1
In a search for estrogen receptor (ER) ligands to be radiolabeled with fluorine-18 for imaging of ER-positive breast tumors with positronemissiontomography (PET), we investigated cyclofenil analogues substituted at the C3 or C4 position of the cyclohexyl group. McMurry coupling of 4,4'-dihydroxybenzophenone with various ketones produced key cyclofenil intermediates, from which C3 and C4 substituents
在寻找用氟 18 放射性标记的雌激素受体 (ER) 配体,以便通过正电子发射断层扫描 (PET) 对 ER 阳性乳腺肿瘤进行成像时,我们研究了在环己基的 C3 或 C4 位置取代的环芬尼类似物。4,4'-二羟基二苯甲酮与各种酮的 McMurry 偶联产生了关键的环芬尼中间体,其中含有烷基和各种氧或氟取代的烷基的 C3 和 C4 取代基被精心设计。对 ERα 和 ERβ 的结合测定表明,C3 位点比 C4 位点更能耐受空间体积和极性基团,这与 ERα 配体结合袋的计算模型一致。氟取代在某些位点的耐受性非常好,使得一些化合物的亲和力与雌二醇相当或更高。这些氟和氟烷基环芬尼尔值得进一步考虑作为氟 18 标记的 ER 配体,用于乳腺肿瘤 ER 的 PET 成像。