1158483-15-8Relevant articles and documents
Iron-catalyzed regioselective cyclotrimerization of alkynes to benzenes
Gawali, Suhas Shahaji,Gunanathan, Chidambaram
, p. 139 - 149 (2019/01/03)
We report the synthesis and characterization of simple di(aminomethyl)pyridine ligated iron-pincer complexes, which catalyzed the regioselective [2+2+2] cyclotrimerization of terminal aryl and alkyl alkynes to provide the 1,2,4-trisubstituted benzene molecules. Interestingly, internal alkynes also exhibited similar cyclization and resulted in hexa-substituted benzene compounds. Increased steric bulk on pincer ligands diminished the selectivity for cycloaddition. Cyclotrimerization reactions proceeded at room temperature upon activation of catalyst by a Grignard reagent. EPR studies indicated thermally induced spin crossover effect in catalyst.
Synthesis of enantioenriched secondary and tertiary alcohols via tricarbonylchromium(0) complexes of benzyl allyl ethers
Abecassis, Keren,Gibson, Susan E.,Martin-Fontecha, Mar
supporting information; experimental part, p. 1606 - 1611 (2009/08/09)
Allyl ethers of the tricarbonylchromium(0) complexes of benzylic alcohols undergo highly enanlioselective benzylic funclionalisation using a chiral base/electrophilic quench sequence; the allyl group is readily removed to reveal a hydroxy group as demonst