Tandem azidination- and hydroazidination-Huisgen [3 + 2] cycloadditions of ynamides. Synthesis of chiral amide-substituted triazoles.
Zhang, Xuejun; Hsung, Richard P.; You, Lingfeng; Organic & biomolecular chemistry 4 (2006) 2679–2682; doi:10.1039/b606680a

data_7151261
_publ_section_title
;
 Tandem azidination- and hydroazidination-Huisgen [3 + 2]
 cycloadditions of ynamides. Synthesis of chiral amide-substituted
 triazoles.
;
_journal_issue                   14
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              2679
_journal_page_last               2682
_journal_paper_doi               10.1039/b606680a
_journal_volume                  4
_journal_year                    2006
_chemical_absolute_configuration rm
_chemical_formula_moiety         'C18 H16 N4 O2'
_chemical_formula_sum            'C18 H16 N4 O2'
_chemical_formula_weight         320.35
_chemical_name_common            05315
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.7353(7)
_cell_length_b                   9.8100(8)
_cell_length_c                   18.0556(14)
_cell_measurement_reflns_used    3441
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      24.11
_cell_measurement_theta_min      2.26
_cell_volume                     1547.2(2)
_computing_cell_refinement       'SAINT, Bruker'
_computing_data_collection       'SMART, Bruker'
_computing_data_reduction        'SAINT, Bruker'
_computing_molecular_graphics    'SHELXTL, Bruker'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    SIR97
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker SMART Platform CCD'
_diffrn_measurement_method       'area detector, omega scans per phi'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'normal-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0299
_diffrn_reflns_av_sigmaI/netI    0.0217
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            9507
_diffrn_reflns_theta_full        26.38
_diffrn_reflns_theta_max         26.38
_diffrn_reflns_theta_min         2.26
_exptl_absorpt_coefficient_mu    0.093
_exptl_absorpt_correction_T_max  0.9862
_exptl_absorpt_correction_T_min  0.9726
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, R. Blessing, 1995'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.375
_exptl_crystal_density_meas      0
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             672
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.195
_refine_diff_density_min         -0.166
_refine_diff_density_rms         0.031
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.014
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     217
_refine_ls_number_reflns         1823
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.014
_refine_ls_R_factor_all          0.0423
_refine_ls_R_factor_gt           0.0332
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0340P)^2^+0.4894P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0768
_refine_ls_wR_factor_ref         0.0837
_reflns_number_gt                1600
_reflns_number_total             1823
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b606680a.txt
_cod_data_source_block           05315
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               7151261