[3+2] cycloaddition reactions in the solid-phase synthesis of 1,2,3-triazoles.
Gao, Yongnian; Lam, Yulin; Organic letters 8 (2006) 3283–3285; doi:10.1021/ol0611494

data_1506090
_publ_section_title
;
 [3+2] cycloaddition reactions in the solid-phase synthesis of
 1,2,3-triazoles.
;
_journal_issue                   15
_journal_name_full               'Organic letters'
_journal_page_first              3283
_journal_page_last               3285
_journal_paper_doi               10.1021/ol0611494
_journal_volume                  8
_journal_year                    2006
_chemical_formula_sum            'C20 H20 N2 O3'
_chemical_formula_weight         336.38
_chemical_name_systematic
; 
 5-Furan-2-yl-2H-[1,2,3]triazole-4-carboxylic acid methyl ester  
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_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                 97.973(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.3028(7)
_cell_length_b                   15.7135(15)
_cell_length_c                   15.8041(15)
_cell_measurement_reflns_used    5015
_cell_measurement_temperature    223(2)
_cell_measurement_theta_max      29.80
_cell_measurement_theta_min      2.59
_cell_volume                     1796.0(3)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      223(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0256
_diffrn_reflns_av_sigmaI/netI    0.0308
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            12403
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         1.84
_exptl_absorpt_coefficient_mu    0.084
_exptl_absorpt_correction_T_max  0.9614
_exptl_absorpt_correction_T_min  0.9534
_exptl_absorpt_correction_type   'sadabs (Sheldrick,2001)'
_exptl_crystal_colour            'light brown'
_exptl_crystal_density_diffrn    1.244
_exptl_crystal_density_meas      0
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             712
_exptl_crystal_size_max          0.57
_exptl_crystal_size_mid          0.52
_exptl_crystal_size_min          0.47
_refine_diff_density_max         0.309
_refine_diff_density_min         -0.234
_refine_diff_density_rms         0.059
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.137
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     280
_refine_ls_number_reflns         4116
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.137
_refine_ls_R_factor_all          0.0631
_refine_ls_R_factor_gt           0.0557
_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^)+(0.0530P)^2^+1.3415P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1441
_refine_ls_wR_factor_ref         0.1478
_reflns_number_gt                3521
_reflns_number_total             4116
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol0611494si20060511_031509.cif
_cod_data_source_block
5-Furan-2-yl-2H-[1,2,3]triazole-4-carboxylic_acid_methyl_ester
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               1506090