title: Poly(methylhydrosiloxane)-supported chiral imidazolinones: new versatile, highly efficient and recyclable organocatalysts for stereoselective Diels-Alder cycloaddition reactions.
abstract: Poly(methylhydrosiloxane) (PMHS) supported organic catalysts promoted the Diels-Alder reaction of dienes with α,β-unsaturated aldehydes, also in pure water, in yields and enantiomeric excesses comparable to those observed with the non-supported catalysts (up to 93% ee). Recycling of the catalysts was performed with no loss of enantioselectivity for at least five reaction cycles.
authors.affiliation: Dipartimento di Chimica Organica e Industriale, Università di Milano, via Venezian 21, 20133, Milano, Italy.
authors.forename: Stefania
authors.initials: S
authors.lastname: Guizzetti
authors.forename: Maurizio
authors.initials: M
authors.lastname: Benaglia
authors.forename: Jay S
authors.initials: JS
authors.lastname: Siegel
mesh_terms: D000447:Aldehydes / Q000737:chemistry*; D000466:Alkadienes / Q000737:chemistry*; D002384:Catalysis; D003500:Cyclization; D007093:Imidazoles / Q000138:chemical synthesis* / Q000737:chemistry; D015394:Molecular Structure; D012833:Siloxanes / Q000737:chemistry*; D013237:Stereoisomerism
chemical_list: D000447:Aldehydes; D000466:Alkadienes; D007093:Imidazoles; D012833:Siloxanes; C402373:poly(methylhydrosiloxane)