Thione Esters as Substrates for the Stereoselective Alkylation of Model Compounds of Nonactic Acids
作者:François Loiseau、Inga Kholod、Reinhard Neier
DOI:10.1002/ejoc.200901513
日期:2010.8
relative configurations could be achieved. In the third route the thioneester 18 was deprotonated with tBuOK. At temperatures below -78 °C, the enolate maintained the cis configuration of the substituents at the tetrahydrofuran ring. The alkylated product 12 could be isolated with a satisfactory cis/trans ratio of 85:15. The modelcompound 12 could be successfully transformed into more hydrophobic derivatives
Lens composition, articles and method of manufacture
申请人:PARAGON OPTICAL INC
公开号:EP0184924A2
公开(公告)日:1986-06-18
A copolymer composition, especially suited for fabricating optical lenses comprising a copolymer of copolymerized comonomers which include about one to about forty percent by weight of an acryloxyalkylsilanol; about one to about seventy five percent by weight of a polyacryloxyalkylpolysiloxane; about one to about seventy five percent by weight of an siloxy substituted ester of acrylic or methacrylic acid; and from about one to about 35 percent by weight of an alkyl or cycloalkyl acrylate or methacrylate having from one to twenty carbon atoms.
Contact lenses and contact lens buttons are formed of such copolymer of copolymerized comonomers by conventional techniques, by injection molding, and by compression molding.
Parsons, Philip J.; Cowell, Justin K., Synlett, 2000, # 1, p. 107 - 109
作者:Parsons, Philip J.、Cowell, Justin K.
DOI:——
日期:——
Chang, Seok; Yoon, Jaeyon; Brookbart, Maurice, Journal of the American Chemical Society, 1994, vol. 116, # 5, p. 1869 - 1879
作者:Chang, Seok、Yoon, Jaeyon、Brookbart, Maurice
DOI:——
日期:——
Regiospezifische Herstellung von primären Allylacetaten (2-Alkenyl-acetaten)
作者:Antonio García Martínez、Angeles Cruces Villalobos、Manuel Oliver Ruiz
DOI:10.1055/s-1988-27464
日期:——
Regiospecific Preparation of Primary Allyl Acetates (2-Alkenyl Acetates) The reaction of primary, secondary and tertiary allyl alcohols 1 with anhydrous magnesium iodide in benzene gives regiospecifically the primary allyl iodides 2. The corresponding primary allyl acetates 3 are obtained regiospecifically by reaction of 2 with anhydrous sodium acetate in dimethylformamide.