Direct access to spirobiisoxazoline via the double 1,3-dipolar cycloaddition of nitrile oxide with allenoate.
Shang, Xinye; Liu, Kun; Zhang, Zhongyin; Xu, Xianhong; Li, Pengfei; Li, Wenjun; Organic & biomolecular chemistry 16 (2018) 895–898; doi:10.1039/c7ob03040a

data_7156053
_publ_section_title
;
 Direct access to spirobiisoxazoline via the double 1,3-dipolar
 cycloaddition of nitrile oxide with allenoate.
;
_journal_issue                   6
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              895
_journal_page_last               898
_journal_paper_doi               10.1039/c7ob03040a
_journal_volume                  16
_journal_year                    2018
_chemical_formula_moiety         'C28 H26 N2 O4'
_chemical_formula_sum            'C28 H26 N2 O4'
_chemical_formula_weight         454.51
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2017-05-12
_audit_creation_method
;
Olex2 1.2
(compiled 2017.03.28 svn.r3405 for OlexSys, GUI svn.r5335)
;
_audit_update_record
;
2017-12-22 deposited with the CCDC.
2018-01-04 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 91.988(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   11.2591(7)
_cell_length_b                   10.2596(5)
_cell_length_c                   19.9617(11)
_cell_measurement_reflns_used    9989
_cell_measurement_temperature    150
_cell_measurement_theta_max      27
_cell_measurement_theta_min      3
_cell_volume                     2304.5(2)
_computing_cell_refinement       'SAINT v8.37A (Bruker, 2015)'
_computing_data_reduction        'SAINT v8.37A (Bruker, 2015)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      150
_diffrn_detector                 'Bruker APEX2 area detector'
_diffrn_detector_area_resol_mean 7.9
_diffrn_detector_type            'CCD area detector'
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device       'three-circle diffractometer'
_diffrn_measurement_device_type  'Bruker SMART APEX2 area detector'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_monochromator  'mirror optics'
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0594
_diffrn_reflns_av_unetI/netI     0.0514
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            28362
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.504
_diffrn_reflns_theta_min         2.687
_diffrn_source                   'microfocus sealed X-ray tube'
_diffrn_source_type              'Incoatec I\ms'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.088
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.7134
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2014/5 (Bruker,2014/5) was used for absorption correction. wR2(int) was 0.0940 before and 0.0598 after correction. The Ratio of minimum to maximum transmission is 0.9568. The \l/2 correction factor is Not present.'
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.310
_exptl_crystal_description       block
_exptl_crystal_F_000             960
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.23
_refine_diff_density_max         0.295
_refine_diff_density_min         -0.268
_refine_diff_density_rms         0.061
_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     309
_refine_ls_number_reflns         5292
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.031
_refine_ls_R_factor_all          0.0860
_refine_ls_R_factor_gt           0.0488
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0491P)^2^+0.7297P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0981
_refine_ls_wR_factor_ref         0.1116
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3725
_reflns_number_total             5292
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7ob03040a2.cif
_cod_data_source_block           mo_cxy0033_0m
_cod_depositor_comments          'Adding full bibliography for 7156053.cif.'
_cod_database_code               7156053
_shelx_shelxl_version_number     2016/6
_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:
 C9(H9A,H9B), C18(H18A,H18B), C27(H27A,H27B)
2.b Aromatic/amide H refined with riding coordinates:
 C1(H1), C2(H2), C3(H3), C4(H4), C5(H5), C12(H12), C13(H13), C14(H14),
 C15(H15), C16(H16), C20(H20), C21(H21), C23(H23), C24(H24)
2.c Idealised Me refined as rotating group:
 C25(H25A,H25B,H25C), C28(H28A,H28B,H28C)
;
_shelx_res_checksum              83396
_olex2_submission_special_instructions 'No special instructions were received'