One-pot conversion of aromatic bromides and aromatics into aromatic nitriles via aryllithiums and their DMF adduct
作者:Sousuke Ushijima、Katsuhiko Moriyama、Hideo Togo
DOI:10.1016/j.tet.2010.11.109
日期:2011.2
molecular iodine in aq NH3. The same treatment of typical aromatics and heteroaromatics with n-butyllithium and subsequently DMF, followed by treatment with molecular iodine in aq NH3 also provided the corresponding aromatic nitriles in good yields. Moreover, the same treatment of aromatic bromides and aromatics with half amount of DIH (1,3-diiodo-5,5-dimethylhydantoin) instead of molecular iodine worked
作者:J. Den Heijer、O.B. Shadid、J. Cornelisse、E. Havinga
DOI:10.1016/0040-4020(77)80192-0
日期:1977.1
hydroxylation, etc) of aromaticcompounds in aqueous media. The first chemical step in these processes is monophotonic ionization of the aromaticcompound in its lowest triplet state, followed by reaction of the radical cation with the nucleophile Quantum yields of photocyanation of 4-fluoro- and 4-chloroanisole indicate that in 99% (mole fraction) water virtually all triplets formed undergo electron
L-Proline was identified as an effective additive to promote the Rosenmund-vonBraun reaction at a lower temperature (80-120 °C). This modified Rosenmund-vonBraun cyanation of aryl bromides exhibits excellent functional-group compatibility, and provide an efficient and convenient approach for the synthesis of aryl nitriles.
Compounds of the formula (I): ##STR1## and pharmaceutically acceptable salts thereof wherein R.sup.1 and R.sup.2 are the same or different and each is hydrogen, hydroxy, halo, alkoxy of 1 to 4 carbon atoms or aralkyloxy of 1 to 4 carbon atoms and X and Y are each hydrogen or nicotinoyl are useful as anti-edema agents, anti-inflammatories, analgesics, anti-pyretics, anti-allergenics and anti-thrombosis agents.