一系列稀土三氟甲磺酸盐(RE(OTf)3,RE = Sc,Y和Lu)首次用作水分稳定的前体,通过与烷氧基钠(NaOR)的原位反应生成稀土醇盐配合物。四氢呋喃。1 H NMR和13 C NMR结果证实了快速的配体交换过程和稀土-氧(RE-OR)键的形成。在原位形成的催化剂显示朝向活开环聚合ε己内酯(ROP)(CL)的反应性高。例如,Lu(OTf)3 /异丙醇钠(NaO i Pr)催化的CL的ROP为[CL] 0 / [NaO i Pr] 0/ [Lu(OTf)3 ] 0进料比为300/3/1的聚(ε-己内酯)(PCL)具有受控的分子量(M n,exp = 11.9 kDa vs M n,theo = 11.8 kDa)并且窄25°C下3分钟内的多分散度(PDI)为1.08。动力学研究和链延伸证实了Lu(OTf)3 / NaO i Pr催化的CL的ROP的受控/活性。另外,通过在Lu(OT
The use of sulfonylamido pyrimidines incorporating an unsaturated side chain as endothelin receptor antagonists
作者:Martin H Bolli、Christoph Boss、Martine Clozel、Walter Fischli、Patrick Hess、Thomas Weller
DOI:10.1016/s0960-894x(02)01084-3
日期:2003.3
A series of compounds structurally related to bosentan 1 featuring an unsaturatedsidechain at position 6 of the core pyrimidine have been studied for their potential to block the ET(A) and ET(B) receptor. Incorporation of a 2-butyne-1,4-diol linker bearing a pyridyl carbamoyl moiety led to in vitro highly potent endothelin receptor antagonists (e.g., 70 and 75). The propargyl derivative 26 significantly
Synthesis of cobalt bis(dicarbollide) conjugates with natural chlorins by the Sonogashira reaction
作者:M. A. Grin、R. A. Titeev、D. I. Brittal、A. V. Chestnova、A. V. Feofanov、I. A. Lobanova、I. B. Sivaev、V. I. Bregadze、A. F. Mironov
DOI:10.1007/s11172-010-0065-8
日期:2010.1
Novel boron-containing conjugates based on the alkynylated cobalt bis(dicarbollide) anion and chlorin e 6 and purpurinimide p-iodophenyl derivatives were synthesized by the Sonogashira reaction. These conjugates can accumulate in the cancer cell cytoplasm and can be considered as potential candidates for using in boron neutron capture therapy of tumors.
Chemoselective Activation of Diethyl Phosphonates: Modular Synthesis of Biologically Relevant Phosphonylated Scaffolds
作者:Pauline Adler、Amandine Pons、Jing Li、Jörg Heider、Bogdan R. Brutiu、Nuno Maulide
DOI:10.1002/anie.201806343
日期:2018.10
Phosphonates have garnered considerable attention for years owing to both their singular biological properties and their synthetic potential. State‐of‐the‐art methods for the preparation of mixed phosphonates, phosphonamidates, phosphonothioates, and phosphinates rely on harsh and poorly selective reaction conditions. We report herein a mild method for the modular preparation of phosphonylated derivatives
Palladium Catalysed Tandem Cyclisation–Anion Capture. Part 5: Cascade Hydrostannylation-bis-cyclisation-intramolecular Anion Capture. Synthesis of Bridged- and Spiro-Cyclic Small and Macrocyclic Heterocycles
作者:Adele Casaschi、Ronald Grigg、José M Sansano、David Wilson、James Redpath
DOI:10.1016/s0040-4020(00)00660-8
日期:2000.9
A series of O- and N-α,ω-enyne derivatives of 2-iodoarylethers and 2-iodoarylamides undergo palladiumcatalysedcascade hydrostannylation of the ω-alkyne moiety at 0–25°C followed by bis-cyclisation at 100–110°C terminating in intramolecular sp3–sp2 Stille coupling. These cascades provide a wide range of 5/6 and 5/12–17 membered bicyclic spiro- and bridged-ring heterocycles.
Esters Of Glucuronide Prodrugs Of Anthracyclines And Method Of Preparation And Use In Tumor-Selective Chemotherapy
申请人:Aben Rene Wilhelmus Marie
公开号:US20090227617A1
公开(公告)日:2009-09-10
The invention relates to novel esters and in particular to some novel esters of glucuronide prodrugs of anthracyclines having tunable water-solubility, their synthesis and use in tumor-selective chemotherapy. It appeared that in the final step in the synthesis of these prodrugs, i.e. the coupling of the glucuronide spacer moiety to the parent drug molecule, protection of the sugar hydroxyls is, surprisingly, no longer required. A process for the preparation of these unprotected sugar spacer moieties is also disclosed.