- Synthesis of 3-Benzazepines by Metal-Free Oxidative C–H Bond Functionalization–Ring Expansion Tandem Reaction
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A metal-free synthesis of biologically important benzazepines is achieved through a single synthetic operation involving an oxidative C–H bond functionalization and ring expansion with diazomethanes as key reagent. This represents a new, strong methodology for the straightforward construction of the seven-ring N-heterocyclic structures under mild conditions using a 2,2,6,6-tetramethylpiperidine 1-oxyl (TEMPO) oxoammonium salt as oxidant. Moderate to good yields are achieved from simple, readily available tetrahydroisoquinolines, and this methodology has been further successfully applied for the synthesis of the 3-benzazepine drug Lorcaserin. A possible mechanistic pathway for the ring expansion step, comprising the extrusion of nitrogen in a concerted asynchronic process, is proposed based on both mechanistic proof and density function theory (DFT) calculations. (Figure presented.).
- Gini, Andrea,Bamberger, Julia,Luis-Barrera, Javier,Zurro, Mercedes,Mas-Ballesté, Rubén,Alemán, José,Manche?o, Olga García
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supporting information
p. 4049 - 4056
(2016/12/30)
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- THERAPEUTIC MACROLIDE COMPOUNDS AND THEIR USE
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The present invention pertains generally to the field of therapeutic compounds, and more specifically to certain macrolide compounds (for convenience, collectively referred to herein as "MC compounds"), which, inter alia, are useful in treatment of cancer. The present invention also pertains to pharmaceutical compositions comprising such compounds, and the use of such compounds and compositions, both in vitro and in vivo, to treat proliferative conditions such as cancer, and in the treatment of diseases and conditions that are mediated by the regulation (e.g. inhibition) of cell proliferation, optionally in combination with another agent.
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Page/Page column 90
(2010/06/17)
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- New series of morpholine and 1,4-oxazepane derivatives as dopamine D 4 receptor ligands: Synthesis and 3D-QSAR model
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Since the identification of the dopamine D43 receptor subtype and speculations about its possible involvement in schizophrenia, much work has been put into development of selective D4 ligands. These selective ligands may be effective antipsychotics without extrapyramidal side effects. This work describes the synthesis of a new series of 2,4-disubstituted morpholines and 2,4-disubstituted 1,4-oxazepanes with selectivity for the dopamine D4 receptor. A 3D-QSAR analysis using the GRID/GOLPE methodology was performed with the purpose to get a better understanding of the relationship between chemical structure and biological activity. Inspection of the coefficient plots allowed us to identify that regions which are important for affinity are situated around the two benzene ring systems, a p-chlorobenzyl group, and the aliphatic amine belonging to the morpholine or 1,4-oxazepane system. In addition, the size of the morpholine or 1,4-oxazepane ring seems to be important for affinity.
- Audouze, Karine,Nielsen, Elsebet ?stergaard.,Peters, Dan
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p. 3089 - 3104
(2007/10/03)
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- Selective Access to Secondary Amines by a Highly Controlled Reductive Mono-N-Alkylation of Primary Amines
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A selective and direct access to secondary amines is reported by reductive mono-N-alkylation of primary amines in the presence of Ti(i-PrO)4 and NaBH4. Secondary amines are obtained exclusively from a set of carbonyl compounds and primary amines, demonstrating high chemoselectivity toward reductive mono-N-alkylation.
- Kumpaty, Hephzibah J.,Bhattacharyya, Sukanta,Rehr, Erik W.,Gonzalez, Amelia M.
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p. 2206 - 2210
(2007/10/03)
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- Disubstituted morpholine, oxazepine or thiazepine derivatives, their preparation and their use as dopamine D4 receptor antagonists
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The present invention relates to compounds of formula (I), any of it enantiomers, or any mixture thereof, or a pharmaceutically acceptable acid addition salt thereof, wherein R1, R2, R3, R4, R11, R12, R13, R14and R15each independently are hydrogen, alkyl, alkoxy, halogen, trifluoromethyl, nitro, cyano, amino, acyl, alkylamino, dialkylamino, aminocarbonyl, or acylamino; R5 is hydrogen, alkyl, alkoxyalkyl, or phenylalkyl; X is —CH2—Z—, Z—CH2—, NH—CO—, —CO—NH—, or —CH═CH—; wherein Z is O, S, CH2, or NH; Y is O, —CH2—W—, —W—CH2—; wherein W is O, or S; and n is 0, 1 or 2. The compounds are useful in the treatment of psychotic disorders.
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