Six-membered cyclic nitronates as 1,3-dipoles in formal [3 + 3]-cycloaddition with donor-acceptor cyclopropanes. Synthesis of new type of bicyclic nitrosoacetals.
Gorbacheva, Evgenia O.; Tabolin, Andrey A.; Novikov, Roman A.; Khomutova, Yulia A.; Nelyubina, Yulia V.; Tomilov, Yury V.; Ioffe, Sema L.; Organic letters 15 (2013) 350–353; doi:10.1021/ol303292c

data_1508871
_publ_section_title
;
 Six-membered cyclic nitronates as 1,3-dipoles in formal [3 +
 3]-cycloaddition with donor-acceptor cyclopropanes. Synthesis of new type
 of bicyclic nitrosoacetals.
;
_journal_issue                   2
_journal_name_full               'Organic letters'
_journal_page_first              350
_journal_page_last               353
_journal_paper_doi               10.1021/ol303292c
_journal_volume                  15
_journal_year                    2013
_chemical_formula_moiety         'C28 H33 N O7'
_chemical_formula_sum            'C28 H33 N O7'
_chemical_formula_weight         495.55
_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
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                103.3570(10)
_cell_angle_beta                 105.4970(10)
_cell_angle_gamma                103.9440(10)
_cell_formula_units_Z            2
_cell_length_a                   9.6224(6)
_cell_length_b                   10.0813(6)
_cell_length_c                   14.8728(9)
_cell_measurement_reflns_used    2216
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      30
_cell_measurement_theta_min      3
_cell_volume                     1280.26(14)
_computing_cell_refinement       'APEX2 (Bruker, 2005)'
_computing_data_collection       'APEX2 (Bruker, 2005)'
_computing_data_reduction        'APEX2 (Bruker, 2005)'
_computing_molecular_graphics    'SHELXTL ver. 5.1 (Sheldrick, 1998b)'
_computing_publication_material  'SHELXTL ver. 5.1 (Sheldrick, 1998b)'
_computing_structure_refinement  'SHELXTL ver. 5.1 (Sheldrick, 1998b)'
_computing_structure_solution    'SHELXTL ver. 5.1 (Sheldrick, 1998b)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device_type  'Bruker SMART APEX2 DUO CCD area detector'
_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  0.0245
_diffrn_reflns_av_sigmaI/netI    0.0439
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            12253
_diffrn_reflns_theta_full        29.00
_diffrn_reflns_theta_max         29.00
_diffrn_reflns_theta_min         2.19
_exptl_absorpt_coefficient_mu    0.092
_exptl_absorpt_correction_T_max  0.983
_exptl_absorpt_correction_T_min  0.973
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'APEX2 (Bruker, 2005)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.286
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             528
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.369
_refine_diff_density_min         -0.233
_refine_diff_density_rms         0.049
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.000
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     328
_refine_ls_number_reflns         6751
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.000
_refine_ls_R_factor_all          0.0654
_refine_ls_R_factor_gt           0.0446
_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^)+(0.0561P)^2^+0.3077P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1049
_refine_ls_wR_factor_ref         0.1185
_reflns_number_gt                5032
_reflns_number_total             6751
_reflns_threshold_expression     I>2/s(I)
_cod_data_source_file            ol303292c_si_006.cif
_cod_data_source_block           GEO130
_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 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_cell_volume        1280.26(13)
_cod_database_code               1508871
_shelx_f_squared_multiplier      1.000