نتایج جستجو برای: furan
تعداد نتایج: 3475 فیلتر نتایج به سال:
In the title compound, C16H12ClFO3S, the dihedral angle between the plane of the benzo-furan ring system [r.m.s. deviation = 0.007 (1) Å] and that of the 4-fluoro-phenyl ring is 76.11 (5)°. In the crystal, mol-ecules are linked into [010] chains via two different inversion-generated pairs of C-H⋯O hydrogen bonds. The crystal structure also exhibits weak π-π inter-actions between the benzene and...
New routes to the synthesis of various novel chiral maleimides are described. The oxabicyclic anhydride 2 readily available exo-Diels-Alder adduct of furan and maleic anhydride was used as a vehicle, which in turn reacted with hydrochlorides of amino acids 3a-f in the presence of Et3N with release of furan to give the requisite novel chiral imides 4a-f in good to moderate yields. The stereosele...
We have synthesized rigid analogues of combretastatin bearing a furan ring in place of the olefinic bridge. These compounds are cytotoxic at nanomolar concentrations in neuroblastoma cells, display a similar structure-activity relationship compared to combretastatin A4, and inhibit tubulin polymerization. We also show that the furan ring can be further functionalized. Thus, it is possible that ...
In the title compound, C22H19N3O4, the dihedral angle between the furan and pyrazole rings is 82.73 (19)° while the dihedral angles between the furan and pyrazole rings and their attached benzene rings are 31.93 (18) and 1.88 (18)°, respectively. In the crystal, inversion dimers linked by pairs of C-H⋯O hydrogen bonds generate R 2 (2)(16) loops. In addition, weak C-H⋯π and aromatic π-π stacking...
This paper describes the synthesis of precursors with a benzo[b]furan skeleton for the intramolecular 1,3-dipolar cycloaddition of azomethine ylides prepared from N-substituted 3-allyl-aminobenzo[b]furan-2-aldehydes and secondary amines derived from α-amino acid esters. Reactions were initiated by heating. The products consisted of four fused rings with three stereogenic centers. Their structur...
In the title compound, C17H15ClO3S, the dihedral angle between the mean planes of the benzo-furan and 3-methyl-phenyl rings is 76.99 (4)°. In the crystal, mol-ecules are linked by C-H⋯O hydrogen bonds into chains along the b-axis direction. These chains are linked by π-π inter-actions between the benzene and furan rings of neighbouring mol-ecules [centroid-centroid distance = 3.976 (2) Å].
A series of heterocycle-linked constrained phenylbenzyl amides were found to be TRPV1 antagonists with promising in vivo profiles. In particular, one of the analogues containing a furan linker exhibited excellent TRPV1 antagonistic activity and in vivo analgesic efficacy. In addition, the binding modes of dibenzyl thiourea, benzylphenethyl amide, and furan-linked phenylbenzyl amide were examine...
Pallescensins are a group of furanosesquiterpenoids isolated from the marine sponge Disidea pallescens by Cimino et al.1 The common feature of these terpenoids is that they all contain a furan moiety; however they have carbon skeletons of varying complexity. Among the pallescensins, pallescensin B 1 presents the most complex architecture, with a unique bicyclo[4.2.2]decane system fused to a fur...
In the title compound, C18H17ClO2S, the dihedral angle between the planes of the benzo-furan ring [r.m.s. deviation = 0.013 (1) Å] and the 4-methyl-phenyl ring is 87.37 (5)°. In the crystal, mol-ecules are linked by C-H⋯O hydrogen bonds and π-π inter-actions between the furan and benzene rings of neighbouring mol-ecules [centroid-centroid distance = 3.525 (2) Å]. In addition, an S⋯S [3.6584 (9)...
In the title compound, C15H10F2O2S, the dihedral angle between the plane of the benzo-furan ring system (r.m.s. deviation = 0.015 Å) and that of the 2-fluoro-phenyl ring is 28.53 (6)°. In the crystal, mol-ecules are linked by C-H⋯O and C-H⋯F hydrogen bonds, and by π-π inter-actions between the furan and benzene rings of neighbouring mol-ecules [centroid-centroid distance = 3.625 (2) Å], forming...
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