125735-40-2Relevant articles and documents
Counterion-Induced Asymmetric Control in Ring-Opening of Azetidiniums: Facile Access to Chiral Amines
Qian, Deyun,Chen, Min,Bissember, Alex C.,Sun, Jianwei
supporting information, p. 3763 - 3766 (2018/03/13)
Counterion-induced stereocontrol is a powerful tool in organic synthesis. However, such enantiocontrol on tetrahedral ammonium cations remains challenging. Described here is the first example of using chiral anion phase-transfer catalysis to achieve intermolecular ring-opening of azetidiniums with excellent enantioselectivity (up to 97 % ee). Precise control over the formation and reaction of the chiral ion pair as well as inhibition of the background reaction by the biphasic system is key to the success of the reaction.
NOVEL HETEROCYCLIC ACRYLAMIDES AND THEIR USE AS PHARMACEUTICALS
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, (2011/06/19)
The invention relates to novel heterocyclic acrylamide compounds (I), to the preparation of the compounds and intermediates used therein, to the use of the compounds as antibacterial medicaments and pharmaceutical compositions containing the compounds.
Substituted benzoylpiperidine derivatives and their use as Neurokinin antagonists
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, (2008/06/13)
The present invention provides a compound of the formula:- or a pharmaceutically acceptable acid addition salt thereof, whereinAr is phenyl substituted by 1 or 2 substituent(s) each independently selected from fluoro and chloro;X is NSO2(C1-C4 alkyl), NSO2(halo(C1-C4 alkyl)) or O;m is 0 or 1 ;n is 1 or 2;p is 1 or 2;q is 1 or 2; and r is 1 or 2, together with processes for the preparation of, intermediates used in the preparation of, compositions containing and uses of, such derivatives. The compounds have tachykinin receptor antagonist activity.
Piperidones as tachykinin antagonists
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, (2008/06/13)
The present invention relates to a compound of the formula:- or a pharmaceutically acceptable acid addition salt or solvate thereof, wherein R is C3-C7 cycloalkyl, (C3-C7 cycloalkyl)C1-C4 alkylene or benzyl;R1 is phenyl optionally substituted by 1 or 2 su
Synthesis and X-ray Crystal Structure of 1,3,3-Trinitroazetidine
Archibald, T. G.,Gilardi, Richard,Baum, K.,George, Clifford
, p. 2920 - 2924 (2007/10/02)
1,3,3-Trinitroazetidine (1) was synthesized and its structure elucidated by X-ray crystallography.Reaction of 1-tert-butyl-3-((methylsulfonyl)oxy)azetidine (3a) with sodium nitrite gave 1-tert-butyl-3-nitroazetidine (4a), which was converted to 1-tert-butyl-3,3-dinitroazetidine (5a) by oxidative nitration.Nitrolysis of 5a with acetyl nitrate gave 1. 1-Benzhydryl-3,3-dinitroazetidine (5b) did not undergo a similar nitrolysis.Single-crystal X-ray analysis of 1 showed that the ring is puckered, with a dihedral angle of 13.6(5) deg between the C-C-C and C-N-C planes, and that the nitramino group exhibits an unusually high (39.4 deg) out-of-plane deformation.A structural optimization with MNDO reproduced the ring pucker and the nitramino bend to within 5 deg.The large bend at the ring nitrogen atom indicates sp3 rather than sp2 for its hybridization.However, the N-N bond length, 1.351(6) Angstroem, falls in the normal range for planar (sp2) nitramines and is ca. 0.1 Angstroem shorter than N-N bonds previously observed in bent nitramines.