Ti-amide catalyzed synthesis of cyclic guanidines from di-/triamines and carbodiimides.
Shen, Hao; Wang, Yang; Xie, Zuowei; Organic letters 13 (2011) 4562–4565; doi:10.1021/ol201752e

data_1502387
_publ_section_title
;
 Ti-amide catalyzed synthesis of cyclic guanidines from di-/triamines and
 carbodiimides.
;
_journal_issue                   17
_journal_name_full               'Organic letters'
_journal_page_first              4562
_journal_page_last               4565
_journal_paper_doi               10.1021/ol201752e
_journal_volume                  13
_journal_year                    2011
_chemical_formula_sum            'C14 H13 N3'
_chemical_formula_weight         223.27
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_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            8
_cell_length_a                   12.771(2)
_cell_length_b                   9.9140(17)
_cell_length_c                   18.545(3)
_cell_measurement_temperature    293(2)
_cell_volume                     2348.0(7)
_computing_cell_refinement       'BRUKER APEXII CCD DIFFRACTOMETER'
_computing_data_collection       'BRUKER APEXII CCD DIFFRACTOMETER'
_computing_data_reduction        'BRUKER APEXII CCD DIFFRACTOMETER'
_computing_molecular_graphics    'SIEMENS SHELXTL'
_computing_publication_material  'SIEMENS SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'BRUKER APEXII CCD DIFFRACTOMETER'
_diffrn_measurement_method       'OMEGA SCAN'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
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_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -22
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_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.20
_exptl_absorpt_coefficient_mu    0.078
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.460958
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.263
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             944
_exptl_crystal_size_max          0.40
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_refine_ls_extinction_method     none
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_refine_ls_R_factor_all          0.0772
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_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^)+(0.0856P)^2^+1.5863P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1321
_refine_ls_wR_factor_ref         0.1717
_reflns_number_gt                1415
_reflns_number_total             2064
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol201752e_si_002.cif
_cod_data_source_block           5ac
_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.

'_exptl_absorpt_correction_type' value 'Multi-scan'
changed to 'multi-scan' 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_cell_volume        2347.9(7)
_cod_original_sg_symbol_H-M      Pbca
_cod_database_code               1502387