Cyclic dipeptides: catalyst/promoter-free, rapid and environmentally benign cyclization of free amino acids
Nonappa,; Ahonen, Kari; Lahtinen, Manu; Kolehmainen, Erkki; Green Chemistry 13 (2011) 1203–; doi:10.1039/c1gc15043j

data_7206036
_publ_section_title
;
 Cyclic dipeptides: catalyst/promoter-free, rapid and environmentally
 benign cyclization of free amino acids
;
_journal_issue                   5
_journal_name_full               'Green Chemistry'
_journal_page_first              1203
_journal_paper_doi               10.1039/c1gc15043j
_journal_volume                  13
_journal_year                    2011
_chemical_formula_moiety         'C12 H18 N2 O2'
_chemical_formula_sum            'C12 H18 N2 O2'
_chemical_formula_weight         222.28
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_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                 97.541(7)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   6.0475(7)
_cell_length_b                   7.8473(10)
_cell_length_c                   11.2904(12)
_cell_measurement_reflns_used    3519
_cell_measurement_temperature    123(2)
_cell_measurement_theta_max      28.283
_cell_measurement_theta_min      0.407
_cell_volume                     531.17(11)
_computing_cell_refinement       DENZO-SMN
_computing_data_collection       Collect
_computing_data_reduction        DENZO-SMN
_computing_molecular_graphics    'Mercury 2.3'
_computing_publication_material  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 or SIR2002'
_diffrn_ambient_temperature      123(2)
_diffrn_detector_area_resol_mean 9
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type  'Kappa APEX II'
_diffrn_measurement_method       '\f and \w 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  0.0462
_diffrn_reflns_av_sigmaI/netI    0.0766
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            2989
_diffrn_reflns_theta_full        27.00
_diffrn_reflns_theta_max         28.53
_diffrn_reflns_theta_min         3.17
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.095
_exptl_absorpt_correction_T_max  0.7457
_exptl_absorpt_correction_T_min  0.5474
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, G. M., 1995)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.390
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             240
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.28
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.334
_refine_diff_density_min         -0.241
_refine_diff_density_rms         0.061
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.056
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     73
_refine_ls_number_reflns         1334
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.056
_refine_ls_R_factor_all          0.0985
_refine_ls_R_factor_gt           0.0637
_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^)+(0.0452P)^2^+0.3347P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1325
_refine_ls_wR_factor_ref         0.1458
_reflns_number_gt                904
_reflns_number_total             1334
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            c1gc15043j.txt
_cod_data_source_block           xsodu204-2
_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_enum 1555 2011-01-17 13:19:09Z saulius 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7206036