title: The synthesis of phosphaisocoumarins by Cu(I)-catalyzed intramolecular cyclization of o-ethynylphenylphosphonic acid monoesters.
abstract: Cu(I)-catalyzed intramolecular cyclization of o-ethynylphenylphosphonic acid monoethyl esters was examined, and a new class of six-membered phosphorus heterocycles was formed with high regioselectivity and good yields. The present reaction is the first example of intramolecular addition of P-OH to alkynes, which provides a convenient way to synthesize novel phosphorus heterocycles having potential bioactivities.
authors.affiliation: Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China.
authors.forename: Ai-Yun
authors.initials: AY
authors.lastname: Peng
authors.forename: Yi-Xiang
authors.initials: YX
authors.lastname: Ding
mesh_terms: D000480:Alkynes / Q000737:chemistry; D002384:Catalysis; D003300:Copper / Q000737:chemistry*; D003374:Coumarins / Q000138:chemical synthesis* / Q000737:chemistry; D018360:Crystallography, X-Ray; D003500:Cyclization; D004791:Enzyme Inhibitors / Q000138:chemical synthesis / Q000737:chemistry; D007454:Iodides / Q000737:chemistry*; D015394:Molecular Structure; D063065:Organophosphonates / Q000737:chemistry*; D054562:Protein Tyrosine Phosphatase, Non-Receptor Type 1; D017027:Protein Tyrosine Phosphatases / Q000037:antagonists & inhibitors
chemical_list: D000480:Alkynes; D003374:Coumarins; D004791:Enzyme Inhibitors; D007454:Iodides; D063065:Organophosphonates; D003300:Copper; C073870:cuprous iodide; D054562:Protein Tyrosine Phosphatase, Non-Receptor Type 1; D017027:Protein Tyrosine Phosphatases