Stereoselective Synthesis and Crystal Structure Analysis of N-Naphthyl-2-deoxy-alpha-D-ribopyranosylamine
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Orthorhombic crystal system
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Triclinic crystal system
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Monoclinic crystal system
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A novel compound of chiral spiro{1-bromo-4-hydroxy-5-N-cyclohexyl-butyro-lactam-6-oxo-dirings3.1.0hexane-2,3′-(4′-diphenylcarbinol-5′-menthyloxy-butyrolatone)} was synthesized via tandem nucleophilic substitution reaction under mild conditions,and its structure was determined by IR ,1H NMR,elemental analysis and X-ray diffraction.The crystal structure of this compound is of monoclinic system,space group P21 with a=9.7356(9),b=12.2760(12),c=14.9577(14),β=101.0300(10)°,Mr=680.66,Z=2,V=1754.6(3)3,Dc=1.288 g/cm3,μ(MoKα)=1.216 mm-1,F(000)=716,the final R=0.0434 and wR=0.0996.
Monoclinic crystal system
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Monoclinic crystal system
Salicylaldehyde
Orthorhombic crystal system
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The title compound, 1,2-bis-(p-nitro-phenylsulfonamido)-4,5-dinitrobenzene, was synthesized and characterized by elemental analysis, IR and 1H NMR. A pale yellow prism crystal of C23H26N8O13S2 (Mr = 686.64) was obtained in DMF solution and determined by single-crystal X-ray diffraction method. It crystallizes in triclinic system, space group P1 with a = 10.346(4), b = 12.210(5), c = 12.976(5) , α = 108.220(8), β = 99.482(4), γ = 95.490(4)°, V = 1516.7(10) 3, Z = 2, Dc = 1.504 g/cm3, F(000) = 712, μ = 0.254, Mr = 686.64, the final R = 0.0561 and wR = 0.1487. One sulfonamido group of the title compound is deprotoned and forms N(3)=C(13). The crystal involves N,N-dimethylamine from the decomposition of DMF and the proton is transferred to N,N- dimethylamine. It is a strong proof for the characterization of deprotoned recognition compound by X-ray single-crystal structure.
Triclinic crystal system
Dimethylamine
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The title compound has been synthesized and its crystal structure was determined by single-crystal X-ray diffraction.The crystal is of orthorhombic system (C23H25N3O12S2,Mr=599.58),space group P212121 with a=6.2102(12),b=17.803(4),c=24.223(5),V=2678.0(9)3,Z=4,Dc=1.487 g/cm3,F(000)=1248,μ=0.268 mm-1,the final R=0.0483 and wR=0.1108 for 4174 observed reflections (I 2σ(I)).The C=S bond,which parallels to the anomeric C-H,adopts α orientation relative to the anomeric position of glucopyranoside.
Orthorhombic crystal system
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Tosyl
Monoclinic crystal system
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The title compound N, N-dimethyl-1-ferrocenylethylaminehydrochloride [Fe(C 5 H 5 )(C 5 H 4 CHCH 3 N + H(CH 3 ) 2 )Cl - ] was synthesised by esterification of the corresponding alcohol, followed by substitution with HN(CH 3 ) 2 and by extracting HCl from CH 2 Cl 2 probably associated with Fe in the substrate molecule. Its structure was first elucidated by X-ray analysis. By analysis of the crystal structure of, it is proposed that diastereoselective ortho-deprotonation directed by Ugi's amine may be ascribed to the different hindrance exerted by methyl group at chiral C.
Hydrochloride
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Monoclinic crystal system
Dihedral angle
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Monoclinic crystal system
Propane
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