1,2-Ethylene-3,3-bis(4′,4′′-dimethoxytrityl Chloride) (E-DMT): Synthesis and Applications of a Novel Protecting Reagent
作者:Yogesh S. Sanghvi、Natsuhisa Oka、Emmanuel A. Theodorakis
DOI:10.1055/s-2004-820033
日期:——
1,2-Ethylene-3,3-bis(4′,4′′-dimethoxytrityl chloride), (E-DMT) was developed as a novel, bifunctional protecting reagent. This new compound was found to have a potential as a multipurpose acid-labile protecting reagent which can afford a 5′,5′-tritylthymidine dimer and a unique 5′,3′-cyclic protected thymidine derivative in modest to good yields.
selectivity studies of dicarboxylicacids within the cavities of new fluorescent Troger's base molecular frameworks (1-3) have been carried out with a critical examination of their role of rigidity as well as flexibility in selective binding in comparison to receptor 5. The chiral resolution of the racemic Troger's base receptors (1 and 2) by chiral recognition with (+)- camphoric acid using hydrogen-bonding
Aromatic aldehydes from benzylbromides via Cobalt(I) mediated benzyl radicals in the presence of aerial oxygen: a mild oxidation reaction in neutral condition
作者:Shyamaprosad Goswami、Ajit Kumar Mahapatra
DOI:10.1016/s0040-4039(98)00110-5
日期:1998.4
Co(PPh3)(3)Cl has been shown to be a novel mediator Tor the conversion of benzylic bromides to aromatic aldehydes under mild conditions in the presence of aerial oxygen probably via benzylic radicals. In the absence of oxygen, the carbon-carbon coupling reactions bale been utilised to afford a series of functionalised benzylic dimers. (C) 1998 Elsevier Science Ltd. All rights reserved.