title: Unexpected four- and eight-membered organo P-Se heterocycles.
abstract: Reaction of [PhP(Se)(micro-Se)](2) (Woollins' reagent, WR) with symmetrically disubstituted diynes: five-membered P(Se)Se(2)C(2) heterocycles and bis-heterocycles with two five-membered P(Se)Se(2)C(2) rings connected through a C-C single bond; (t)Bu-C[triple bond, length as m-dash]C-C[triple bond, length as m-dash]C-(t)Bu reacts differently to afford an unprecedented four-membered P(Se)SeC(2) heterocycle with one unreacted triple bond and a fused bis-heterocycle containing two five-membered P(Se)SeC(3) rings fused at the middle two carbons of the diyne to give a heterocyclic analogue of pentalene, [3.3.0]octa-1-6-diene.
authors: School of Chemistry, University of St Andrews, Fife, UK.
authors: Guoxiong
authors: G
authors: Hua
authors: Yang
authors: Y
authors: Li
authors: Alexandra M Z
authors: AM
authors: Slawin
authors: J Derek
authors: JD
authors: Woollins
mesh_terms: D006576:Heterocyclic Compounds, 4 or More Rings / Q000138:chemical synthesis / Q000737:chemistry*; D009943:Organophosphorus Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D016566:Organoselenium Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D010758:Phosphorus / Q000737:chemistry; D012643:Selenium / Q000737:chemistry
chemical_list: D006576:Heterocyclic Compounds, 4 or More Rings; D009943:Organophosphorus Compounds; D016566:Organoselenium Compounds; D010758:Phosphorus; D012643:Selenium