24152-39-4Relevant articles and documents
Efficient Solution-Phase Parallel Synthesis of 4-Substituted N-Protected Piperidines
Wang, Xiaoyang,Kauppi, Anna M.,Olsson, Roger,Almqvist, Fredrik
, p. 4586 - 4592 (2007/10/03)
Practical conditions for the synthesis of 4-substituted N-protected piperidines through CuCN·2LiBr-catalyzed organozinc additions to 1-acylpyridinium salts and subsequent hydrogen-transfer hydrogenation have been established. The reaction sequence is performed at room temperature and provides 4-substituted N-protected piperidines in excellent overall yields without the isolation of intermediate dihydropyridines, In those cases in which the organozinc addition results in mixtures of 2- and 4-substituted dihydropyridines, the 2-substituted isomers are efficiently scavenged with maleic anhydride and subsequently removed by a mild extractive workup with NaHCO3 (sat.). The N-acyl group can conveniently be exchanged from N-phenoxycarbonyl to N-tBoc, thus allowing orthogonal deprotection strategies. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003.
Muscarinic agonists
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, (2008/06/13)
Compounds and methods are provided for the treatment of disease conditions in which modification of cholinergic, especially muscarinic m1, m4, or both m1 and m4, receptor activity has a beneficial effect. In the method, an effective amount of a compound is administered to a patient in need of such treatment.
Mesogenic Esters of the 4-(Alkylpiperidino) Benzoic Acids
Adomenas, P.,Sirutkaitis, R.
, p. 269 - 276 (2007/10/02)
A number of alkyl and 4-substituted phenyl 4-(4-alkylpiperidino) benzoates have been prepared and their proprties examined.