Novel Electron Acceptors Bearing a Heteroquinonoid System. 4. Syntheses, Properties, and Charge-Transfer Complexes of 2,7-Bis(dicyanomethylene)-2,7-dihydrobenzo[2,1-b:3,4-b']dithiophene, 2,7-Bis(dicyanomethylene)-2,7-dihydrobenzo[1,2-b:4,3-b']dithiophene, and 2,6-Bis(dicyanomethylene)-2,6-dihydrobenzo[1,2-b:4,5-b']dithiophene
摘要:
The three title compounds were prepared as novel hetero-TCNQ electron accepters comprising the quinonoid skeletons of different benzodithiophene types between two dicyanomethylene groups. On the basis of cyclic voltammetry, they have electron affinities comparable to or stronger than that of TCNQ. In addition, the extensive building blocks serve to induce the effective reduction of on-site coulombic repulsion. They thus behaved as superior electron accepters for forming electrically conductive charge-transfer complexes. In particular, 2,7-bis(dicyanomethylene)-2,7-dihydrobenzo-[2,1-b:3,4-b']dithiophene was the most tractable in terms of stability and solubility, giving a variety of conductive complexes with typical electron donors of TTT, TTF,and TPBP types. Most of these complexes showed a characteristic broad electronic transition in the infrared region of 2.9-4.0 kcm(-1), supporting the idea that their crystal structures assume a stacking form of segregated donor and acceptor columns with mixed valence states.
Preparation and Regioselective Magnesiation or Lithiation of Bis(trimethylsilyl)methyl-Substituted Heteroaryls for the Generation of Highly Functionalized Heterocycles
作者:Thomas Klatt、Veronika Werner、Marina G. Maximova、Dorian Didier、Yitzhak Apeloig、Paul Knochel
DOI:10.1002/chem.201500627
日期:2015.5.18
A wide range of bis(trimethylsilyl)methyl (BTSM)‐ substituted heteroaryl derivatives has been prepared by using Kumada–Corriu or Negishi cross‐coupling reactions. The regioselective lithiation or magnesiation of these building blocks bearing a bulky BTSM group by using magnesium or lithium 2,2,6,6‐tetramethylpiperidide bases followed by quenching reactions with different electrophiles provides various
Simultaneous and Stereoselective Formation of Planar and Axial Chiralities in Enantiopure Sulfinyl Iron Diene Complexes
作者:Robert S. Paley、Jane M. Liu、Bruce R. Lichtenstein、Vanessa L. Knoedler、Toby T. Sanan、Drew J. Adams、Jorge Fernández、Paul R. Rablen
DOI:10.1021/ol027306q
日期:2003.2.1
[reaction: see text] Enantiopure (1Z,3E)-1-sulfinyl dienes bearing an o-dithianylphenyl group can be prepared and complexed with (bda)Fe(CO)(3) to afford the corresponding sulfinyl dieneiron(0) tricarbonyl complexes. This diastereoselective complexation introduces planar and axial chirality simultaneously, with a high degree of facial selectivity as well as atropselectivity. Dynamic kinetic resolution
[EN] INHIBITORS OF PURINE NUCLEOSIDE PHOSPHORYLASE - SYNTHESIS AND USE THEREOF FOR TREATMENT OF T-CELL ACUTE LYMPHOBLASTIC LEUKEMIA AND LYMPHOMA<br/>[FR] INHIBITEURS DE LA SYNTHÈSE DE LA PURINE NUCLÉOSIDE PHOSPHORYLASE ET LEUR UTILISATION POUR LE TRAITEMENT DE LA LEUCÉMIE LYMPHOBLASTIQUE AIGUË À LYMPHOCYTES T ET DU LYMPHOME
申请人:USTAV ORGANICKE CHEMIE A BIOCHEMIE AV CR V V I
公开号:WO2021083438A1
公开(公告)日:2021-05-06
The present invention relates to new compounds of general formula I, their synthesis, their pharmaceutically acceptable salts, and their use in treatment of T-cell acute lymphoblastic leukemia and lymphoma.