Direct Enantioselective Brønsted Acid Catalyzed N-Acyliminium Cyclization Cascades of Tryptamines and Ketoacids
摘要:
A direct enantio- and diastereoselective N-acyliminium cyclization cascade through chiral phosphoric acid catalyzed condensation of tryptamines with gamma- and delta-ketoacid derivatives to provide architecturally complex heterocycles has been developed. The reaction is technically simple to perform, atom-efficient, and broad in scope. Employing 10 mol % of (R)-BINOL derived chiral phosphoric acids in refluxing toluene allowed the polycyclic product materials to be generated in good yields (53-99%) and moderate to high enantioselectivities (68-98% ee).
[EN] (4, 5, 6, 7-TETRAHYDRO-1-H-INDOL-7-YL) ACETIC ACID DERIVATIVES FOR TREATMENT OF ALZHEIMER'S DISEASE<br/>[FR] DERIVES D'ACIDE (4,5,6,7-TETRAHYDRO-1-H-INDOL-7-YL)-ACETIQUE DESTINES AU TRAITEMENT DE LA MALADIE D'ALZHEIMER
申请人:MERCK SHARP & DOHME
公开号:WO2005108362A1
公开(公告)日:2005-11-17
Compounds of formula: (I); are disclosed. The compounds are useful in treating or preventing diseases associated with deposition of Aβ in the brain.
公式为(I)的化合物已被披露。这些化合物在治疗或预防与大脑中Aβ沉积相关的疾病方面具有用处。
(4, 5, 6, 7-Tetrahydro-1-H-Indol-7-Yl) Acetic Acid Derivatives for Treatment of Alzheimer's Disease
申请人:Bettati Michela
公开号:US20070232678A1
公开(公告)日:2007-10-04
Compounds of formula I:
are disclosed. The compounds are useful in treating or preventing diseases associated with deposition of Aβ in the brain.
公式I的化合物已被披露。这些化合物可用于治疗或预防与Aβ在大脑中沉积相关的疾病。
New derivatives of bicyclo[4,2,1]nonane
作者:W. Carruthers、M. I. Qureshi
DOI:10.1039/j39700002238
日期:——
9-oxo-8-oxabicyclo[5,3,0]dec-6-ene-1-carboxylate. Reduction of the latter with lithium hydridotri-t-butoxyaluminate in tetrahydrofuran affords a mixture of ethyl endo- and ethyl exo-hydroxy-9-oxobicyclo[4,2,1]nonane-1-carboxylates, in which the endo-compound predominates. These products are thought to be formed by way of 1-ethoxycarbonyl-2-oxocycloheptaneacetaldehyde.
Saturated cycloalkyl [b] pyrrole-1(2H)-acetic acid amides and derivatives thereof
申请人:WARNER-LAMBERT COMPANY
公开号:EP0212588A1
公开(公告)日:1987-03-04
A unique series of saturated cycloalky[b]pyrrole-1 (2H)-acetic acid amides are useful as agents for the reversal of amnesia. Intermediates for preparing the compounds, pharmaceutical composition containing the compounds, and method for using the pharmaceutical compositions for treating senility and for the reversal of amnesia are described.