5-Substituted 2-tributylstannylfurans which were synthesized by the reaction of corresponding 5-substituted 2-lithiofurans with tributylstannyl chloride, were treated with two equimolar amounts of lead tetraacetate at room temperature to give corresponding 5-substituted 5-acetoxy-2(5H)-furanones in good yields. The 5-acetoxy-2(5H)-furanone was heated at 80 °C in acetic acid-acetic anhydride containing
γ-heterosubstituted γ-methyl-α,β-butenolides are presented, starting mainly from C3 synthons (glyceraldehyde, glycidaldehyde, acrolein and 2,3-epoxypropyl ethers). Good general methods for the preparation of γ-hydroxymethyl-α,β-butenolide 2, several of its ether derivatives, as well as of γ-bromomethyl-α,β-butenolide 5, are given. The reactivities of these structurallysimple but highly functionalized compounds
MANUFACTURE, METHOD AND USE OF ACTIVE SUBSTANCE-RELEASING MEDICAL PRODUCTS FOR PERMANENTLY KEEPING BLOOD VESSELS OPEN
申请人:Hoffmann Erika
公开号:US20100063585A1
公开(公告)日:2010-03-11
The invention relates to stents and catheter balloons having optimized coatings for eluting rapamycin as well as methods for manufacturing these coatings.
MANUFACTURE, METHOD AND USE OF DRUG-ELUTING MEDICAL DEVICES FOR PERMANENTLY KEEPING BLOOD VESSELS OPEN
申请人:Hoffmann Erika
公开号:US20130005758A1
公开(公告)日:2013-01-03
The invention relates to stents and catheter balloons having optimized coatings for eluting rapamycin as well as methods for manufacturing these coatings.