Synthesis of (pyridin-2-yl)hydrazine conjugates as bifunctional chelates using the Suzuki–Miyaura reaction
作者:Jeffrey B. Arterburn、Bj K. Bryant、DaJun Chen
DOI:10.1039/b304153k
日期:——
Palladium catalyzed CâC couplings were used to connect (pyridin-2-yl)hydrazine to organic substrates, including a phenylalanine derivative, providing a new method for introducing this important ligand.
Linkage Effects on Binding Affinity and Activation of GPR30 and Estrogen Receptors ERα/β with Tridentate Pyridin-2-yl Hydrazine Tricarbonyl−Re/<sup>99m</sup>Tc(I) Chelates
作者:Chinnasamy Ramesh、Bj Bryant、Tapan Nayak、Chetana M. Revankar、Tamara Anderson、Kathryn E. Carlson、John A. Katzenellenbogen、Larry A. Sklar、Jeffrey P. Norenberg、Eric R. Prossnitz、Jeffrey B. Arterburn
DOI:10.1021/ja066360p
日期:2006.11.1
We describe a new structural class of neutral tridentate pyridin-2-yl hydrazine chelates for labeling with tricarbonyl Re/99mTc(I) under aqueous conditions and investigate the receptor binding of synthetic estradiol derivatives with the novel G-protein-coupled receptor GPR30 and estrogen receptors ERalpha/beta. The steroid linkage affected the affinity and selectivity of estrogen binding with these receptors. Fluorescence assays based on calcium signaling demonstrate that membrane-permeable chelates 2 and 3 interact with the receptors in whole cells. These results suggest that in vitro assays will facilitate the development of targeted imaging agents for intracellular receptors and the feasibility of targeting GPR30 and ERalpha/beta for diagnostic tumor imaging.
Catalytic Amination of 2-Substituted Pyridines with Hydrazine Derivatives
作者:Jeffrey B. Arterburn、Kalla Venkateswara Rao、Ranjit Ramdas、Benjamin R. Dible
DOI:10.1021/ol015731y
日期:2001.5.1
were prepared in a one-step palladium-catalyzed amination reaction using chelating phosphine ligands. 2-Pyridyl chlorides, bromides, and triflates were effective electrophiles in these reactions. Di-tert-butyl hydrazodiformate was an excellent hydrazine substrate, and the resulting products were deprotected under mild conditions. Catalytic amination provides a direct route to protected bifunctional
Synthesis of 17-α-Substituted Estradiol-Pyridin-2-yl Hydrazine Conjugates as Effective Ligands for Labeling with Alberto's Complex <i>f</i><i>ac</i>-[Re(OH<sub>2</sub>)<sub>3</sub>(CO)<sub>3</sub>]<sup>+</sup> in Water
作者:Jeffrey B. Arterburn、Cesear Corona、Kalla Venkateswara Rao、Kathryn E. Carlson、John A. Katzenellenbogen
DOI:10.1021/jo034780g
日期:2003.9.1
hydrochloride salt 25. The 17alpha-estradiol-tricarbonylrhenium(I) complex 4 was synthesized by labeling 25 with fac-[Re(OH(2))(3)(CO)(3)](+) in aqueous ethanol. This complex exhibited excellent stability and high receptor binding affinity for the estrogen receptor, and it is a promising model for evaluation of the analogous Tc-99m complexes as diagnostic imaging agents for breast tumors.