作者:Reinhard Sarges、Rodney C. Schnur、John L. Belletire、Michael J. Peterson
DOI:10.1021/jm00396a037
日期:1988.1
formation from glucose, catalyzed by the enzyme aldosereductase, is believed to play a role in the development of certain chronic complications of diabetes mellitus. Spiro hydantoins derived from five- and six-membered ketones fused to an aromatic ring or ring system inhibitaldosereductase isolated from calf lens. In vivo these compounds are potent inhibitors of sorbitol formation in sciatic nerves of
Ru(II)-Catalyzed Asymmetric Transfer Hydrogenation of 3-Fluorochromanone Derivatives to Access Enantioenriched <i>cis</i>-3-Fluorochroman-4-ols through Dynamic Kinetic Resolution
Enantioenriched cis-3-fluoro-chroman-4-ol derivatives were conveniently prepared by the ruthenium-catalyzed asymmetric transferhydrogenation of a new family of 3-fluoro-chromanones through a dynamic kinetic resolution process. The reaction proceeded under mild conditions using a low catalyst loading and HCO2H/Et3N (1:1) as the hydrogen source, affording the reduced fluorinated alcohols in good yields
Phenyl or phenoxy substituted spiro-imidazolidinedione derivatives, pharmaceutical compositions thereof and process for their preparation
申请人:PFIZER INC.
公开号:EP0017379A1
公开(公告)日:1980-10-15
Novel phenyl or phenoxy substituted spiro-imidazolidinedione derivatives of the formula
wherein X is O, S, SO or SO2 Y is H, CH3, CH30, Ph, PhO, F, Cl or Br at the 6 or 8 position and Ar is Ph or OPh at the 6 or 8 position, are useful as aldose reductase inhibitors and as therapeutic agents for the treatment of chronic diabetic complications. The derivatives include the phenyl or phenoxy substituted spiro-imidazolidene naphthalene, chroman, thiochroman sulfoxychroman, sulfonochroman dione compounds and the substituted forms thereof. A process for their preparation and pharmaceutical composition are also claimed.
作者:Yong-Li Zhong、David T. Boruta、Donald R. Gauthier、David Askin
DOI:10.1016/j.tetlet.2011.07.018
日期:2011.9
A two step efficient and practical synthesis of a variety of 4-chromanones is described. Phenols undergo a Michael addition to acrylonitriles in the presence of catalytic amounts of potassium carbonate and tert-butanol to generate the corresponding 3-aryloxypropanenitriles in 50-93% yields. Treatment of the resulting aryloxypropionitriles with 1.5 equiv of TfOH and 5 equiv of TFA, followed by an aqueous work up afforded 4-chromanones in moderate to excellent yields. (C) 2011 Elsevier Ltd. All rights reserved.
SARGES, REINHARD;SCHNUR, RODNEY C.;BELLETIRE, JOHN L.;PETERSON, MICHAEL J+, J. MED. CHEM., 31,(1988) N 1, 230-243
作者:SARGES, REINHARD、SCHNUR, RODNEY C.、BELLETIRE, JOHN L.、PETERSON, MICHAEL J+