New protocols for the assembly of the tetracyclic framework associated with the aromatic erythrina alkaloids.
Stanislawski, Pauline C.; Willis, Anthony C.; Banwell, Martin G.; Organic letters 8 (2006) 2143–2146; doi:10.1021/ol060642c

data_1505981
_publ_section_title
;
 New protocols for the assembly of the tetracyclic framework associated
 with the aromatic erythrina alkaloids.
;
_journal_issue                   10
_journal_name_full               'Organic letters'
_journal_page_first              2143
_journal_page_last               2146
_journal_paper_doi               10.1021/ol060642c
_journal_volume                  8
_journal_year                    2006
_chemical_compound_source
;
?
;
_chemical_formula_moiety         ' C17 H20 Cl N O3 '
_chemical_formula_sum            'C17 H20 Cl N O3'
_chemical_formula_weight         321.80
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_audit_creation_date             05-16-03
_audit_creation_method           CRYSTALS_ver_12-03-99
_audit_update_record
;
2005-03-17 - Report on C17 H20 Cl N O3 
             by Anthony C. Willis
             for  Pauline Stanislawski and Martin Banwell

2005-03-17 - passes checkcif tests with minor warnings  

;
_cell_angle_alpha                77.3182(16)
_cell_angle_beta                 79.7927(16)
_cell_angle_gamma                81.7076(16)
_cell_formula_units_Z            2
_cell_length_a                   7.4101(2)
_cell_length_b                   10.2790(2)
_cell_length_c                   10.2887(3)
_cell_measurement_reflns_used    10766
_cell_measurement_temperature    200
_cell_measurement_theta_max      27
_cell_measurement_theta_min      3
_cell_volume                     747.91(3)
_computing_cell_refinement
; 
 Denzo/Scalepack (Otwinowski & Minor, 1996) 
;
_computing_data_collection
; 
 COLLECT (Nonius BV, 1997) 
;
_computing_data_reduction
; 
 Denzo/Scalepack (Otwinowski & Minor, 1996) 
;
_computing_molecular_graphics
; 
ORTEP-II (1976) in teXsan (MSC, 1992-1997)
;
_computing_publication_material
; 
 CRYSTALS (Watkin et al 2003) 
;
_computing_structure_refinement
; 
 CRYSTALS (Watkin et al 2003) 
;
_computing_structure_solution
; 
 SIR92 (Altomare et al, 1994) 
;
_diffrn_ambient_temperature      200
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type
; 
Nonius Kappa CCD 
;
_diffrn_measurement_method       ' \f and \w scans with CCD '
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.07
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            14903
_diffrn_reflns_theta_full        27.5
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         2.592
_diffrn_standards_decay_%        0.00
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.268
_exptl_absorpt_correction_T_max  0.950
_exptl_absorpt_correction_T_min  0.902
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details
;
via Gaussian method (Coppens, 1970) implemented in maXus (2000)
;
_exptl_crystal_colour            ' yellow '
_exptl_crystal_density_diffrn    1.429
_exptl_crystal_density_meas      ?
_exptl_crystal_description       ' block '
_exptl_crystal_F_000             340
_exptl_crystal_size_max          0.55
_exptl_crystal_size_mid          0.27
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.27
_refine_diff_density_min         -0.23
_refine_ls_extinction_method     None
_refine_ls_goodness_of_fit_ref   1.0550
_refine_ls_hydrogen_treatment    refxyz
_refine_ls_matrix_type           full
_refine_ls_number_parameters     259
_refine_ls_number_reflns         2802
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0372
_refine_ls_R_factor_gt           0.0302
_refine_ls_shift/su_max          0.005163
_refine_ls_structure_factor_coef F
_refine_ls_weighting_details
;
 Method, part 1, Chebychev polynomial, (Watkin, 1994, Prince, 1982) 
 [weight] = 1.0/[A~0~*T~0~(x)+A~1~*T~1~(x) ... +A~n-1~]*T~n-1~(x)] 
 where A~i~ are the Chebychev coefficients listed below and x= Fcalc/Fmax 
 Method = Robust Weighting (Prince, 1982) 
 W = [weight] * [1-(deltaF/6*sigmaF)^2^]^2^ 
 A~i~ are: 
 1.15 0.260 0.854 
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.0411
_refine_ls_wR_factor_gt          0.0381
_refine_ls_wR_factor_ref         0.0381
_reflns_limit_h_max              9
_reflns_limit_h_min              -9
_reflns_limit_k_max              13
_reflns_limit_k_min              -12
_reflns_limit_l_max              13
_reflns_limit_l_min              0
_reflns_number_gt                2802
_reflns_number_total             3401
_reflns_threshold_expression     I>3.00u(I)
_cod_data_source_file            ol060642csi20060315_060441.cif
_cod_data_source_block           ban0505
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
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 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_sg_symbol_H-M      'P -1 '
_cod_original_formula_sum        ' C17 H20 Cl N O3 '
_cod_database_code               1505981