1620644-95-2Relevant academic research and scientific papers
Access to Highly Enantioenriched Donepezil-like 1,4-Dihydropyridines as Promising Anti-Alzheimer Prodrug Candidates via Enantioselective Tsuji Allylation and Organocatalytic Aza-Ene-Type Domino Reactions
??n?a?, Mihaela-Liliana,Azzouz, Rabah,Peauger, Ludovic,Gembus, Vincent,Petit, Emilie,Bailly, Laetitia,Papamica?l, Cyril,Levacher, Vincent
, p. 10231 - 10240 (2018/07/25)
This work aims at exploiting both the enantioselective Tsuji allylation of allyl carbonate 6 and an organocatalytic aza-ene-type domino reaction between enal 3a and β-enaminone 4a to develop a straightforward access to all of the four possible stereoisomers of a donepezil-like 1,4-dihydropyridine 1a (er up to 99.5:0.5; overall yield up 64%), an anti-Alzheimer's prodrug candidate. This strategy was extended to the preparation of other enantioenriched 1,4-dihydropyridines 1b-i (eight examples), highlighting its potential in the development of these chiral AChE inhibitors.
OXIDISABLE PYRIDINE DERIVATIVES, THEIR PREPARATION AND USE AS ANTI-ALZHEIMER AGENTS
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Page/Page column 44; 53, (2014/08/07)
A compound of formula (I) in which the dotted lines indicate the presence of at least one double bond; n = 0 to 4; R3 and R4 are H, or when n = 1, R3 and R4 can also form together a double bond between the carbon atoms, and m = 0, 1 or 2, Z is CH or N or Z is C and - CHR3- is =CH- linked by the double bond to cyclopentanone; or - (-)m- is absent, and Z is NH, >N-alkyl, >N-phenyl, >N-benzyl or >N heteroaryl; R8 is alkyl, aryl or heteroaryl which can be optionally substituted; EWG represents an electron withdrawing group selected from the group comprising COOR, COSR, CONRR', CN, COR, CF3, SOR, SO2R, SONRR', SO2NRR', NO2, halogen, heteroaryl; and the pharmaceutical salts and stereisomers thereof. The compounds of formula (I) are potent in the treatment of neurodegenerative diseases such as Alzheimer's disease.
