150851-98-2Relevant articles and documents
RuO4-catalyzed oxidation reactions of isoxazolino-2- azanorbornane derivatives: A short-cut synthesis of tricyclic lactams and peptidomimetic γ-amino acids
Memeo, Misal Giuseppe,Bovio, Bruna,Quadrelli, Paolo
, p. 1907 - 1914 (2011)
A rapid access to peptidomimetic conformationally constrained γ-amino acids has been developed through the efficient RuO4-mediated oxidation of regioisomeric isoxazolino-2-azanorbornane derivatives. The key intermediates are tricyclic lactams,
Structure-reactivity relationships of zwitterionic 1,3-diaza-Claisen rearrangements
Potter, Rachel Aranha,Bowser, Amy M.,Yang, Yanbo,Madalengoitia, Jose S.,Ziller, Joseph W.
, p. 11772 - 11782 (2013)
Bridged bicyclic tertiary allylic amines aza-norbornene 1 and isoquinuclidene 2 add to isocyanates, isothiocyanates, and in situ-generated carbodiimides to form zwitterionic intermediates that undergo 1,3-diaza-Claisen rearrangements to afford highly substituted ureas, thioureas, and guanidines, respectively. Aza-norbornene 1 is significantly more reactive toward 1,3-diaza-Claisen rearrangements than isoquinuclidene 2. This reactivity difference is most likely due to the inherent ring strain in the aza-bicyclo[2.2.1]heptene ring system of aza-norbornene 1. The most apparent reactivity trend of the heterocumulenes is that the most electron-deficient heterocumulenes are more reactive toward 1,3-diaza-Claisen rearrangements. The introduction of a new stereocenter α- to the nucleophilic nitrogen in aza-norbornene 1 and isoquinuclidine 2 decreases the reactivity toward 1,3-diaza-Claisen rearrangements, while the exodiastereomers 3b and 4b are less reactive than the corresponding endodiastereomers 3a and 4a. Isocyanates that bear an electron-withdrawing group react with allylic amines 1-3b to afford mixtures of ureas and isoureas; however, with excess isocyanate and heat, thermodynamic equilibration is possible affording ureas. Inspired by this observation, a one-pot reaction of isocyanates with amines 1, 2, and 3b followed by BF3·OEt2-catalyzed isomerization of the urea/isourea mixture was developed that affords the corresponding ureas in excellent yields.
Isoxazoline-carbocyclic aminols for nucleoside synthesis through aza-Diels-Alder reactions
Quadrelli, Paolo,Piccanello, Andrea,Martinez, Naiara Vazquez,Bovio, Bruna,Mella, Mariella,Caramella, Pierluigi
, p. 7370 - 7379 (2006)
A novel approach to useful aminols for the synthesis of carbocyclic nucleosides is reported starting from a convenient source, the 2-azanorborn-5-enes. These are readily available through the Grieco cycloaddition of cyclopentadiene with iminium salts and
Rearrangement of 2-azanorbornenes to tetrahydrocyclopenta[c]pyridines under the action of activated alkynes – A short pathway for construction of the altemicidin core
Nasirova, Dinara K.,Malkova, Anastasia V.,Polyanskii, Kirill B.,Yankina, Kristina Yu.,Amoyaw, Prince N.-A.,Kolesnik, Irina A.,Kletskov, Alexey V.,Godovikov, Ivan A.,Nikitina, Eugeniya V.,Zubkov, Fedor I.
, p. 4384 - 4387 (2017)
A simple approach to a series of 2,4a,7,7a-tetrahydro-1H-cyclopenta[c]pyridines was proposed on the basis of the amino-Claisen rearrangement of readily accessible 2-azabicyclo[2.2.1]hept-5-enes under the action of dialkyl acetylenedicarboxylates, methyl propiolate or propiolamide. The rearrangement is highly diastereoselective and leads to the formation of only one isomer with cis-annulation of the five- and six-membered rings in satisfactory yields. Using the developed method, close analogs of the altemicidin and SB-203207 cores were synthesized.
SUBSTITUTED 2-AZABICYCLES AND THEIR USE AS OREXIN RECEPTOR MODULATORS
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Paragraph 0183; 0184, (2014/09/30)
The present invention is directed to compounds of Formula I: wherein X is N or CR1; Y is N or CR2; R1 is H, alkoxy, halo, triazolyl, pyrimidinyl, oxazolyl, isoxazole, oxadiazolyl, or pyrazolyl; R2 is H, alkyl, alkoxy, or halo; Z is NH or O; R3 is H, alkyl, alkoxy, halo, or triazolyl; R4 is H or alkyl; or R3 and R4, together with the atoms to which they are attached, form a 6-membered aryl ring or a 5- or 6-membered heteroaryl ring; R5 is pyridyl, pyrazinyl, or pyrimidinyl, wherein the pyridyl, pyrazinyl, or pyrimidinyl is optionally substituted with halo or alkyl; and n is 1 or 2. Methods of making the compounds of Formula I are also described. The invention also relates to pharmaceutical compositions comprising compounds of Formula I. Methods of using the compounds of the invention are also within the scope of the invention.
Polysulfones of new structural types as perspective antioxidant agents
Gorbunova, Marina,Anikina, Lada
, p. 655 - 661 (2013/07/27)
A series of polysulfones of new structural types on the basis of azanorbornenes, 2,2-diallyl-1,1,3,3-tetraethylguanidiniumchloride and tris(diethylamino)diallylaminophosphonium salts were obtained by free radical polymerization reaction. Their antioxidant
From cyclopentadiene to isoxazoline-carbocyclic nucleosides: a rapid access to biological molecules through aza-Diels-Alder reactions
Quadrelli, Paolo,Piccanello, Andrea,Mella, Mariella,Corsaro, Antonino,Pistarà, Venerando
, p. 3541 - 3547 (2008/09/21)
A rapid access to carbocyclic nucleosides containing a fused isoxazoline ring is proposed through the Grieco cycloaddition of cyclopentadiene to iminium salts. The prolific elaboration of the isoxazoline cycloadducts allowed preparation of the target amin
Chlorination/cyclodehydration of amino alcohols with SOCl2: An old reaction revisited
Xu, Feng,Simmons, Bryon,Reamer, Robert A.,Corley, Edward,Murry, Jerry,Tschaen, David
, p. 312 - 315 (2008/09/17)
(Chemical Equation Presented) A simple, one-pot preparation of cyclic amines via efficient chlorination of amino alcohols with use of SOCl2 has been developed. This approach obviates the need for the classical N-protection/O-activation/cyclization/deprotection sequence commonly employed for this type of transformation. The reaction pathways and the general scope of this method have also been investigated.
A 1,3-Diaza-Claisen rearrangement that affords guanidines
Bowser, Amy M.,Madalengoitia, Jose S.
, p. 3409 - 3412 (2007/10/03)
(Chemical Equation Presented) N-Alkyl-N′-tosylthioureas activated by EDCI react with azanorbonenes at room temperature through a 1,3-diaza-Claisen rearrangement, affording highly substituted, bicyclic guanidines in moderate to good yields.
7-oxo-2-azabicyclo[2.2.1]heptanes as selective muscarinic receptor antagonist
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, (2008/06/13)
The present invention relates to muscarinic receptor modulators, specifically, 7-oxo-2-azabicyclo[2.2.1]heptanes of formula (I) which are useful for the treatment of various diseases and conditions, for example, Alzheimer's disease, glaucoma, psychosis, particularly schizophrenia or schizophreniform conditions, mania, pain, bipolar disorder, depression, sleeping disorders, epilepsy, gastrointestinal motility disorders, urinary incontinence, and cognition enhancement.