Efficient dibenzo[c]acridine helicene-like synthesis and resolution: scaleup, structural control, and high chiroptical properties.
Jierry, Loïc; Harthong, Steven; Aronica, Christophe; Mulatier, Jean-Christophe; Guy, Laure; Guy, Stéphan; Organic letters 14 (2012) 288–291; doi:10.1021/ol202799j

data_1503476
_publ_section_title
;
 Efficient dibenzo[c]acridine helicene-like synthesis and resolution:
 scaleup, structural control, and high chiroptical properties.
;
_journal_issue                   1
_journal_name_full               'Organic letters'
_journal_page_first              288
_journal_page_last               291
_journal_paper_doi               10.1021/ol202799j
_journal_volume                  14
_journal_year                    2012
_chemical_formula_moiety         'C48 H36 N2 O2'
_chemical_formula_sum            'C48 H36 N2 O2'
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_space_group_IT_number           60
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2n 2ab'
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_atom_sites_solution_primary     direct
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   11.4305(8)
_cell_length_b                   25.443(2)
_cell_length_c                   12.0501(8)
_cell_measurement_reflns_used    8310
_cell_measurement_temperature    110
_cell_measurement_theta_max      66.5860
_cell_measurement_theta_min      3.4729
_cell_volume                     3504.5(4)
_computing_cell_refinement
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.19 (release 27-10-2011 CrysAlis171 .NET)
(compiled Oct 27 2011,15:02:11)
;
_computing_data_collection
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.19 (release 27-10-2011 CrysAlis171 .NET)
(compiled Oct 27 2011,15:02:11)
;
_computing_data_reduction
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.19 (release 27-10-2011 CrysAlis171 .NET)
(compiled Oct 27 2011,15:02:11)
;
_computing_molecular_graphics    'CAMERON (Watkin et al., 1996)'
_computing_publication_material  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_refinement  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_solution    'SIR97 (Altomare et al., 1999)'
_diffrn_ambient_temperature      110
_diffrn_detector_area_resol_mean 10.4685
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Xcalibur, Atlas, Gemini ultra'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_source         'Enhance Ultra (Cu) X-ray Source'
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.5418
_diffrn_reflns_av_R_equivalents  0.046
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       28
_diffrn_reflns_limit_k_min       -30
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            20145
_diffrn_reflns_theta_full        66.661
_diffrn_reflns_theta_max         66.661
_diffrn_reflns_theta_min         3.474
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.604
_exptl_absorpt_correction_T_max  0.909
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_exptl_absorpt_process_details
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CrysAlisPro, Agilent Technologies,
Version 1.171.35.19 (release 27-10-2011 CrysAlis171 .NET)
(compiled Oct 27 2011,15:02:11)
Analytical numeric absorption correction using a multifaceted crystal
            model based on expressions derived by R.C. Clark & J.S. Reid.
(Clark, R. C. & Reid, J. S. (1995). Acta Cryst. A51, 887-897)
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.275
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1416
_exptl_crystal_size_max          0.613
_exptl_crystal_size_mid          0.380
_exptl_crystal_size_min          0.199
_refine_diff_density_max         0.23
_refine_diff_density_min         -0.22
_refine_ls_extinction_coef       61(4)
_refine_ls_extinction_method     'Larson (1970), Equation 22'
_refine_ls_goodness_of_fit_ref   0.9889
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     236
_refine_ls_number_reflns         3096
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0433
_refine_ls_R_factor_gt           0.0400
_refine_ls_shift/su_max          0.0004308
_refine_ls_shift/su_mean         0.0000557
_refine_ls_structure_factor_coef Fsqd
_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: 
 0.188E+04 0.319E+04 0.199E+04 851. 202. 
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1145
_refine_ls_wR_factor_gt          0.1097
_refine_ls_wR_factor_ref         0.1145
_reflns_limit_h_max              13
_reflns_limit_h_min              0
_reflns_limit_k_max              30
_reflns_limit_k_min              0
_reflns_limit_l_max              14
_reflns_limit_l_min              0
_reflns_number_gt                2805
_reflns_number_total             3096
_reflns_threshold_expression     I>2.0\s(I)
_oxford_diffrn_Wilson_B_factor   2.01
_oxford_diffrn_Wilson_scale      0.16
_oxford_refine_ls_r_factor_ref   0.0433
_oxford_refine_ls_scale          3.29(5)
_oxford_reflns_number_all        3096
_oxford_reflns_threshold_expression_ref I>-10.0\s(I)
_cod_data_source_file            ol202799j_si_003.cif
_cod_data_source_block           1
_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.

'_atom_sites_solution_primary' value 'Direct' changed to
'direct' 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      'P b c n '
_cod_database_code               1503476
_iucr_refine_instruction_details_constraints
;
BLOCK SCALE X'S, U'S 
CONT EXTPARAM 
RIDE C   (  11,X'S) H   ( 111,X'S) H   ( 112,X'S) 
RIDE C   (  12,X'S) H   ( 121,X'S) H   ( 122,X'S) 
RIDE C   (  14,X'S) H   ( 141,X'S) 
RIDE C   (  15,X'S) H   ( 151,X'S) 
RIDE C   (  17,X'S) H   ( 171,X'S) 
RIDE C   (  18,X'S) H   ( 181,X'S) 
RIDE C   (  19,X'S) H   ( 191,X'S) 
RIDE C   (  20,X'S) H   ( 201,X'S) 
RIDE C   (  21,X'S) H   ( 211,X'S) 
RIDE C   (  22,X'S) H   ( 221,X'S) 
RIDE C   (  23,X'S) H   ( 231,X'S) 
RIDE C   (  24,X'S) H   ( 241,X'S) 
RIDE C   (  25,X'S) H   ( 251,X'S) 
RIDE C   (  26,X'S) H   ( 261,X'S) H   ( 262,X'S) H   ( 263,X'S) 
END                                                                             
;
_iucr_refine_instruction_details_restraints
;
NO 
REM   HREST   START (DO NOT REMOVE THIS LINE) 
REM   HREST   END (DO NOT REMOVE THIS LINE) 
END                                                                             
;