Reaction discovery employing macrocycles: transannular cyclizations of macrocyclic bis-lactams.
Han, Chong; Rangarajan, Sathish; Voukides, Alicia C.; Beeler, Aaron B.; Johnson, Richard; Porco, Jr, John A; Organic letters 11 (2009) 413–416; doi:10.1021/ol802729f

data_1503760
_publ_section_title
;
 Reaction discovery employing macrocycles: transannular cyclizations of
 macrocyclic bis-lactams.
;
_journal_issue                   2
_journal_name_full               'Organic letters'
_journal_page_first              413
_journal_page_last               416
_journal_paper_doi               10.1021/ol802729f
_journal_volume                  11
_journal_year                    2009
_chemical_absolute_configuration unk
_chemical_formula_moiety         'C28 H34 N2 O2'
_chemical_formula_sum            'C28 H34 N2 O2'
_chemical_formula_weight         430.57
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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            4
_cell_length_a                   10.3629(19)
_cell_length_b                   14.474(3)
_cell_length_c                   15.641(3)
_cell_measurement_reflns_used    2721
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      19.10
_cell_measurement_theta_min      2.42
_cell_volume                     2346.0(8)
_computing_cell_refinement       'Bruker SAINT+'
_computing_data_collection       'Bruker APEX2'
_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      173(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker X8 APEX II diffractometer'
_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  0.1144
_diffrn_reflns_av_sigmaI/netI    0.0551
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            42676
_diffrn_reflns_theta_full        26.40
_diffrn_reflns_theta_max         26.40
_diffrn_reflns_theta_min         1.92
_exptl_absorpt_coefficient_mu    0.076
_exptl_absorpt_correction_T_max  0.9989
_exptl_absorpt_correction_T_min  0.9557
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.219
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             928
_exptl_crystal_size_max          0.60
_exptl_crystal_size_mid          0.03
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.168
_refine_diff_density_min         -0.216
_refine_diff_density_rms         0.046
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.927
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     311
_refine_ls_number_reflns         2722
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.927
_refine_ls_R_factor_all          0.0718
_refine_ls_R_factor_gt           0.0498
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0796P)^2^+0.3688P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1118
_refine_ls_wR_factor_ref         0.1237
_reflns_number_gt                2099
_reflns_number_total             2722
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol802729f_si_004.cif
_cod_data_source_block           compound20
_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 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        2346.1(8)
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               1503760