[EN] NEW THIENOPYRIMIDINE DERIVATIVES, A PROCESS FOR THEIR PREPARATION AND PHARMACEUTICAL COMPOSITIONS CONTAINING THEM [FR] NOUVEAUX DÉRIVÉS DE THIÉNOPYRIMIDINE, PROCÉDÉ POUR LEUR PRÉPARATION ET COMPOSITIONS PHARMACEUTIQUES LES CONTENANT
A rapid, efficient, and metal-free Lewis acid-mediated methodology has been developed for the site-selective synthesis of unsymmetrical oxygenated biaryls. This simple and efficient methodology furnished highly oxygenated and functionalized unsymmetrical biaryls in good to excellent yields by the direct oxidative coupling of electron-rich arenes to the α-position of carbonyl functionality of in situ
Intramolecular Diels−Alder Reactions of Brominated Masked <i>o</i>-Benzoquinones. A Detour Method To Synthesize Highly Functionalized Oxatricyclic [<i>m</i>.3.1.0] Ring Systems from 2-Methoxyphenols
作者:Ken-Ching Lin、Yi-Ling Shen、N. S. Kameswara Rao、Chun-Chen Liao
DOI:10.1021/jo020316k
日期:2002.11.1
Intramolecular Diels-Alder (IMDA) reactions of masked o-benzoquinones (MOBs) 5a-d to 7a-d and 17a-d to 19a-d generated in situ from 2-methoxyphenols 2-4 and 14-16, respectively, in the presence of alkenols 1a-d, resulting in highly functionalized oxatricyclic [m.3.1.0] ring systems are described. The MOBs 5a-d to 7a-d underwent the IMDA reactions to furnish the adducts 8a-d, 10a-d, and 12a-d (direct
The present invention concerns functionalized photoreactive compounds of formula (I), that are particularly useful in materials for the alignment of liquid crystals. Due to the adjunction of an electron withdrawing group to specific molecular systems bearing an unsaturation directly attached to two unsaturated ring systems, exceptionally high photosensitivities, excellent alignment properties as well as good mechanical robustness could be achieved in materials comprising said functionalized photoreactive compounds of the invention.