Total Synthesis and Structural Revision of the Piperarborenines via Sequential Cyclobutane C-H Arylation
Will R. Gutekunst; Phil S. Baran; Journal of the American Chemical Society 133 (2011) 19076–19079; doi:10.1021/ja209205x

data_4107173
_publ_section_title
;
 Total Synthesis and Structural Revision of the Piperarborenines via
 Sequential Cyclobutane C-H Arylation
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              19076
_journal_page_last               19079
_journal_paper_doi               10.1021/ja209205x
_journal_volume                  133
_journal_year                    2011
_chemical_formula_sum            'C14 H17 N O3 S'
_chemical_formula_weight         279.35
_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                   4.7093(4)
_cell_length_b                   9.8130(8)
_cell_length_c                   30.237(3)
_cell_measurement_reflns_used    5610
_cell_measurement_temperature    123(2)
_cell_measurement_theta_max      25.46
_cell_measurement_theta_min      2.47
_cell_volume                     1397.3(2)
_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      123(2)
_diffrn_measured_fraction_theta_full 0.976
_diffrn_measured_fraction_theta_max 0.977
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w 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  0.0390
_diffrn_reflns_av_sigmaI/netI    0.0332
_diffrn_reflns_limit_h_max       2
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       36
_diffrn_reflns_limit_l_min       -36
_diffrn_reflns_number            9501
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.49
_diffrn_reflns_theta_min         1.35
_exptl_absorpt_coefficient_mu    0.235
_exptl_absorpt_correction_T_max  0.9133
_exptl_absorpt_correction_T_min  0.7933
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.328
_exptl_crystal_description       block
_exptl_crystal_F_000             592
_exptl_crystal_size_max          0.36
_exptl_crystal_size_mid          0.34
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.266
_refine_diff_density_min         -0.181
_refine_diff_density_rms         0.043
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.06(8)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.966
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     174
_refine_ls_number_reflns         2540
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.966
_refine_ls_R_factor_all          0.0354
_refine_ls_R_factor_gt           0.0332
_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^)+(0.0572P)^2^+0.4023P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0881
_refine_ls_wR_factor_ref         0.0913
_reflns_number_gt                2429
_reflns_number_total             2540
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja209205x_si_002.cif
_cod_data_source_block           baran178
_cod_database_code               4107173