Synthesis of Fused-β-Lactams through Selective Gold-Catalyzed Oxycyclization of Dioxolane-Tethered Enynes
Benito Alcaide; Pedro Almendros; Teresa Martínez del Campo; M. Rosario Torres; Journal of Organic Chemistry 78 (2013) 8956–8965; doi:10.1021/jo401390k

data_4028601
_publ_section_title
;
 Synthesis of Fused-\b-Lactams through Selective Gold-Catalyzed
 Oxycyclization of Dioxolane-Tethered Enynes
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              8956
_journal_page_last               8965
_journal_paper_doi               10.1021/jo401390k
_journal_volume                  78
_journal_year                    2013
_chemical_formula_sum            'C21 H21 N O4'
_chemical_formula_weight         351.39
_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                   6.4739(6)
_cell_length_b                   15.5769(15)
_cell_length_c                   18.5242(17)
_cell_measurement_reflns_used    2556
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      19.79
_cell_measurement_theta_min      2.56
_cell_volume                     1868.0(3)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_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      296(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  '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  0.0803
_diffrn_reflns_av_sigmaI/netI    0.0844
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            16424
_diffrn_reflns_theta_full        27.00
_diffrn_reflns_theta_max         27.00
_diffrn_reflns_theta_min         1.71
_exptl_absorpt_coefficient_mu    0.087
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.249
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             744
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.13
_refine_diff_density_max         0.127
_refine_diff_density_min         -0.167
_refine_diff_density_rms         0.033
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.6(14)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.998
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     235
_refine_ls_number_reflns         4058
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.998
_refine_ls_R_factor_all          0.1350
_refine_ls_R_factor_gt           0.0393
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0300P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0798
_refine_ls_wR_factor_ref         0.1004
_reflns_number_gt                1845
_reflns_number_total             4058
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo401390k_si_002.cif
_cod_data_source_block           tmc281b
_cod_database_code               4028601