A mild and highly chemoselective iodination of alcohol using polymer supported DMAP
作者:DIPARJUN DAS、JASHA MOMO H ANAL、LALTHAZUALA ROKHUM
DOI:10.1007/s12039-016-1158-1
日期:2016.11
supported DMAP is used in catalytic amount and is recovered and reused several times. Additionally, this method is highly chemoselective. A mild and highly selective iodination of alcohols using polymer supported 4-(Dimethylamino)pyridine (DMAP) in catalytic amount is reported. The basecatalyst can be easily recovered by simple filtration and reused several times without appreciable loss in activity.
benzylic position has been achieved via a 'transition-metal-free' intramolecular dehydrogenative coupling (IDC). The construction of 2-oxindole moieties was carried out through formation of carbon-carbon bonds using KOt-Bu-catalyzed one pot C-alkylation of beta-N-arylamido esters with alkyl halides followed by a dehydrogenative coupling. Experimental evidences indicated toward a radical-mediated path for
Synthesis and biological evaluation of a fluorescent analog of phenytoin as a potential inhibitor of neuropathic pain and imaging agent
作者:Thomas H. Walls、Scott C. Grindrod、Dawn Beraud、Li Zhang、Aparna R. Baheti、Sivanesan Dakshanamurthy、Manoj K. Patel、Milton L. Brown、Linda H. MacArthur
DOI:10.1016/j.bmc.2012.06.042
日期:2012.9
Here we report on a novelfluorescentanalog of phenytoin as a potential inhibitor of neuropathic pain with potential use as an imaging agent. Compound 2 incorporated a heptyl side chain and dansyl moiety onto the parent compound phenytoin and produced greater displacement of BTX from sodium channels and greater functional blockade with greatly reduced toxicity. Compound 2 reduced mechano-allodynia
treatment of tertiary and secondary allylicalcohols containing a terminal double bond, and their acetyl derivatives, with triphenylphosphine and iodine under mild conditions leads regiospecifically and in high stereoselectivity to the corresponding primary allylic iodides, which can react ‘in situ’ with diverse nucleophiles. Primary allylicalcohols and benzyl alcohols and acetates are also transformed