title: Two novel diastereoselective three-component reactions of alkenes or 3,4-dihydro-(2H)-pyran with urea/thiourea-aldehyde mixtures: [4 + 2] cycloaddition vs Biginelli-type reaction.
abstract: Two novel diastereoselective three-component reactions of alkenes or 3,4-dihydro-(2H)-pyran with urea/thiourea-aldehyde mixtures are described. [reaction: see text]
authors.affiliation: Department of Chemistry, Zhejiang University, Hangzhou 310027, P.R. China.
authors.forename: Yulin
authors.initials: Y
authors.lastname: Zhu
authors.forename: Shenlin
authors.initials: S
authors.lastname: Huang
authors.forename: Jieping
authors.initials: J
authors.lastname: Wan
authors.forename: Lei
authors.initials: L
authors.lastname: Yan
authors.forename: Yuanjiang
authors.initials: Y
authors.lastname: Pan
authors.forename: Anxin
authors.initials: A
authors.lastname: Wu
mesh_terms: D000447:Aldehydes / Q000737:chemistry*; D000475:Alkenes / Q000737:chemistry*; D002384:Catalysis; D015394:Molecular Structure; D011714:Pyrans / Q000737:chemistry*; D013237:Stereoisomerism; D013890:Thiourea / Q000737:chemistry*; D014508:Urea / Q000737:chemistry*
chemical_list: C518272:3,4-dihydro-(2H)-pyran; D000447:Aldehydes; D000475:Alkenes; D011714:Pyrans; D014508:Urea; D013890:Thiourea