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author:("siv, julius")
1.  (11aS)-1,5,11,11a-Tetra­hydro-1-benzo­thieno[3,2-f]indolizin-3(2H)-one 
The absolute configuration of the title compound, C14H13NOS, was assigned from the synthesis and confirmed by the structure determination. There are two independent mol­ecules in the asymmetric unit. The central six-membered ring of the indolizine moiety adopts an envelope conformation, with the greatest deviations from the mean planes being 0.569 (3) and 0.561 (3) Å for the indolizine bridgehead C atoms of the two mol­ecules. The benzothieno ring attached to the indolizine ring system is planar to within 0.015 (3) Å in both mol­ecules. In the crystal, weak C—H⋯O and C—H⋯π inter­actions lead to the formation of a three-dimensional framework structure.
doi:10.1107/S1600536813031693
PMCID: PMC3885070  PMID: 24454246
2.  (8aR,9R)-9-Hy­droxy-7,8,8a,9-tetra­hydro­furo[3,2-f]indolizin-6(4H)-one 
The title compound, C10H11NO3, crystallizes with four independent mol­ecules in the asymmetric unit. Their geometries are very similar and corresponding bond distances are almost identical. The central six-membered ring of the indolizine moiety adopts a envelope conformation [the displacement of the flap atom (the C atom opposite the N atom) being 0.539 (2), 0.548 (3), 0.509 (3) and 0.544 (3) Å in the four molecules], while the conformation of the oxopyrrolidine ring is close to that of a flat envelope. The displacements of the non-fused C atom opposite the C=O group of the pyrrolidine ring of the four mol­ecules are 0.366 (3), 0.335 (3), 0.173 (3) and −0.310 (3) Å. In the crystal, O—H⋯O hydrogen bonds link the mol­ecules into chains, which run parallel to the c axis. The absolute configuration was assigned from the synthesis.
doi:10.1107/S1600536812040378
PMCID: PMC3470388  PMID: 23125801
3.  2-Chloro-N-(2-methyl­phen­yl)benzamide 
In the title compound, C14H12ClNO, the two aromatic rings are almost coplanar, making a dihedral angle of 4.08 (18)°. In the crystal, N—H⋯O hydrogen bonds link the mol­ecules into infinite chains running along the a axis.
doi:10.1107/S1600536812023902
PMCID: PMC3379489  PMID: 22719687
4.  2-Chloro-N-(2,6-dimethyl­phen­yl)benzamide 
In the title compound, C15H14ClNO, the dihedral angle between the benzoyl and the aniline rings is 3.30 (18)°. In the crystal, N—H⋯O hydrogen bonds link the mol­ecules into chains running along the a axis.
doi:10.1107/S1600536812015607
PMCID: PMC3344534  PMID: 22590296
5.  N-(2,3-Dimethyl­phen­yl)-2-methyl­benzamide 
In the title compound, C16H17NO, the two aromatic rings make a dihedral angle of 5.9 (2)°, while the central amide core –NH—C(=O)– is twisted by 44.0 (3) and 47.1 (3)° out of the planes of the 2,3-dimethyl­phenyl and 2-methyl­phenyl rings, respectively. In the crystal, N—H⋯O hydrogen bonds link the mol­ecules into infinite chains running along the b axis.
doi:10.1107/S1600536811050732
PMCID: PMC3239120  PMID: 22199968
6.  (4R,6S,7S,8S,8aS)-6-Ethyl-7,8-dihy­droxy-4-methyl-1,2,3,5,6,7,8,8a-octa­hydro­indolizin-4-ium iodide 
The title compound, C11H22NO2 +·I−, is a chiral mol­ecule with five stereogenic centres. The absolute configuration was assigned from the synthesis and confirmed by the structure determination. The central six-membered ring of the indolizine system adopts a chair conformation, with two atoms displaced by −0.690 (2) and 0.550 (2) Å from the plane of the other four atoms. The conformation of the pyrrolidine ring is close to that of an envelope, with the flap atom displaced by 0.563 (2) Å from the plane of the remaining four atoms. In the crystal, there are two O—H⋯I hydrogen bonds.
doi:10.1107/S1600536811051099
PMCID: PMC3239140  PMID: 22199988
7.  (8aRS)-8,8a-Dihydro­furo[3,2-f]indolizine-6,9(4H,7H)-dione 
The title compound, C10H9NO3, is a chiral mol­ecule with one stereogenic carbon atom, but which crystallizes as a racemate in the centrosymmetric space group P21/n. The central six-membered ring of the indolizine moiety adopts a definite envelope conformation, while the conformation of the oxopyrrolidine ring is close to that of a flat-envelope with a maximum deviation of 0.352 (1) Å for the flap atom.
doi:10.1107/S1600536811027383
PMCID: PMC3213484  PMID: 22091063

Results 1-7 (7)