Synthesis of Polyfluoroalkyl Cyclobutenes from 3-Aza-1,5-enynes via an Aza-Claisen Rearrangement/Cyclization Cascade.
Xin, Xiaoyi; Wang, Dongping; Wu, Fan; Wang, Chunxiang; Wang, Haolong; Li, Xincheng; Wan, Boshun; Organic letters 15 (2013) 4512–4515; doi:10.1021/ol4020738

data_1512320
_publ_section_title
;
 Synthesis of Polyfluoroalkyl Cyclobutenes from 3-Aza-1,5-enynes via an
 Aza-Claisen Rearrangement/Cyclization Cascade.
;
_journal_issue                   17
_journal_name_full               'Organic letters'
_journal_page_first              4512
_journal_page_last               4515
_journal_paper_doi               10.1021/ol4020738
_journal_volume                  15
_journal_year                    2013
_chemical_formula_sum            'C27 H22 F3 N O4 S'
_chemical_formula_weight         513.52
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_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_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 98.403(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.3946(8)
_cell_length_b                   19.3743(12)
_cell_length_c                   12.6676(8)
_cell_measurement_reflns_used    1554
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      20.68
_cell_measurement_theta_min      2.59
_cell_volume                     2523.7(3)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_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      296(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Smart Apex II CCD'
_diffrn_measurement_method       '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  0.0305
_diffrn_reflns_av_sigmaI/netI    0.0422
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            9576
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.94
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.184
_exptl_absorpt_correction_T_max  0.9729
_exptl_absorpt_correction_T_min  0.8882
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.352
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             1064
_exptl_crystal_size_max          0.66
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.806
_refine_diff_density_min         -0.450
_refine_diff_density_rms         0.053
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.030
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     325
_refine_ls_number_reflns         4443
_refine_ls_number_restraints     18
_refine_ls_restrained_S_all      1.043
_refine_ls_R_factor_all          0.1092
_refine_ls_R_factor_gt           0.0685
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1568P)^2^+0.0730P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2158
_refine_ls_wR_factor_ref         0.2469
_reflns_number_gt                2713
_reflns_number_total             4443
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol4020738_si_001.cif
_cod_data_source_block           0913a
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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_sg_symbol_H-M      'P2(1)/c  '
_cod_database_code               1512320