898777-59-8Relevant articles and documents
Generation and reaction of alkyl radicals in open reaction vessels
McErlean, Christopher S. P.,Tatunashvili, Elene
supporting information, p. 7818 - 7821 (2020/11/02)
An operationally simple process to transform alkyl iodides into reactive alkyl radicals is described. Aryl diazonium salts react with Hantzsch esters and molecular oxygen to give aryl radicals, which participate in halogen atom transfers to give alkyl radicals. These intermediates react with a variety of acceptors. The reaction cascade occurs at room temperature, in open reaction vessels, with short reaction times. This journal is
Stereoselective synthesis of lower and upper rim functionalized tetra-α isomers of calix[4]pyrroles
Díaz-Moscoso, Alejandro,Hernández-Alonso, Daniel,Escobar, Luis,Arroyave, Frank A.,Ballester, Pablo
supporting information, p. 226 - 229 (2017/11/27)
Hydroxyaryl alkyl ketones with functionalized alkyl chains often fail to produce the corresponding tetra-α calix[4]pyrroles in Br?nsted acid mediated condensations with pyrrole. A remarkable effect exerted by the addition of methyltrialkylammonium chloride during the acid-mediated syntheses of a series of meso-(tetrahydroxyaryl)-meso-tetraalkylcalix[4]- pyrroles featuring alkyl terminal chloro or ester groups is reported. The ammonium salt enhances the cyclocondensation reaction and induces the almost exclusive formation of the tetra-α isomers.
