Cobalt-Catalyzed Oxidant-Free Spirocycle Synthesis by Liberation of Hydrogen.
Lv, Ningning; Liu, Yue; Xiong, Chunhua; Liu, Zhanxiang; Zhang, Yuhong; Organic letters 19 (2017) 4640–4643; doi:10.1021/acs.orglett.7b02266

data_1547032
_publ_section_title
;
 Cobalt-Catalyzed Oxidant-Free Spirocycle Synthesis by Liberation of
 Hydrogen.
;
_journal_issue                   17
_journal_name_full               'Organic letters'
_journal_page_first              4640
_journal_page_last               4643
_journal_paper_doi               10.1021/acs.orglett.7b02266
_journal_volume                  19
_journal_year                    2017
_chemical_formula_moiety         'C14 H14 N2 O3'
_chemical_formula_sum            'C14 H14 N2 O3'
_chemical_formula_weight         258.27
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_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_date             2016-05-30
_audit_creation_method
;
Olex2 1.2
(compiled 2014.03.20 svn.r2914 for OlexSys, GUI svn.r4816)
;
_cell_angle_alpha                90.00
_cell_angle_beta                 99.399(8)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   5.6185(6)
_cell_length_b                   22.7525(18)
_cell_length_c                   10.3579(7)
_cell_measurement_reflns_used    1149
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      29.0753
_cell_measurement_theta_min      3.3384
_cell_volume                     1306.3(2)
_computing_cell_refinement
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.11 (release 16-05-2011 CrysAlis171 .NET)
(compiled May 16 2011,17:55:39)
;
_computing_data_collection
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.11 (release 16-05-2011 CrysAlis171 .NET)
(compiled May 16 2011,17:55:39)
;
_computing_data_reduction
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.11 (release 16-05-2011 CrysAlis171 .NET)
(compiled May 16 2011,17:55:39)
;
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2008)'
_computing_structure_solution    'ShelXS (Sheldrick, 2008)'
_diffrn_ambient_temperature      293.15
_diffrn_detector_area_resol_mean 10.3592
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Xcalibur, Atlas, Gemini ultra'
_diffrn_measurement_method       '\w scans'
_diffrn_orient_matrix_UB_11      0.0299915000
_diffrn_orient_matrix_UB_12      0.0223842000
_diffrn_orient_matrix_UB_13      0.0475225000
_diffrn_orient_matrix_UB_21      -0.0667667000
_diffrn_orient_matrix_UB_22      -0.0148116000
_diffrn_orient_matrix_UB_23      0.0425661000
_diffrn_orient_matrix_UB_31      0.1049645000
_diffrn_orient_matrix_UB_32      -0.0158483000
_diffrn_orient_matrix_UB_33      0.0273829000
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0603
_diffrn_reflns_av_unetI/netI     0.0737
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -4
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -27
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            4943
_diffrn_reflns_theta_full        25.35
_diffrn_reflns_theta_max         25.35
_diffrn_reflns_theta_min         3.35
_diffrn_source                   'Enhance (Mo) X-ray Source'
_exptl_absorpt_coefficient_mu    0.094
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.72627
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.11 (release 16-05-2011 CrysAlis171 .NET)
(compiled May 16 2011,17:55:39)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.313
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             544
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.297
_refine_diff_density_min         -0.262
_refine_diff_density_rms         0.071
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.031
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     174
_refine_ls_number_reflns         2384
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.031
_refine_ls_R_factor_all          0.1127
_refine_ls_R_factor_gt           0.0710
_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^)+(0.0982P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1713
_refine_ls_wR_factor_ref         0.2065
_reflns_number_gt                1466
_reflns_number_total             2384
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol7b02266_si_002.cif
_cod_data_source_block           160530_lnn_1_078_1
_cod_original_cell_volume        1306.33(19)
_cod_database_code               1547032
_chemical_oxdiff_formula         c28h29o4
_reflns_odcompleteness_completeness 99.60
_reflns_odcompleteness_iscentric 1
_reflns_odcompleteness_theta     26.32
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Secondary CH2 refined with riding coordinates:
 C11(H11A,H11B), C12(H12A,H12B)
2.b Aromatic/amide H refined with riding coordinates:
 C1(H1), C2(H2), C3(H3), C4(H4)
2.c Idealised Me refined as rotating group:
 C13(H13A,H13B,H13C), C14(H14A,H14B,H14C)
;