Total Synthesis of Pactamycin and Pactamycate: A Detailed Account
Stephen Hanessian; Ramkrishna Reddy Vakiti; Stéphane Dorich; Shyamapada Banerjee; Benoît Deschênes-Simard; Journal of Organic Chemistry 77 (2012) 9458–9472; doi:10.1021/jo301638z

data_4027636
_publ_section_title
;
 Total Synthesis of Pactamycin and Pactamycate: A Detailed Account
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              9458
_journal_page_last               9472
_journal_paper_doi               10.1021/jo301638z
_journal_volume                  77
_journal_year                    2012
_chemical_absolute_configuration rmad
_chemical_compound_source        'Synthesized by the authors. See text'
_chemical_formula_moiety         'C38 H51 N O6 Si2'
_chemical_formula_sum            'C38 H51 N O6 Si2'
_chemical_formula_weight         673.98
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 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
_cell_angle_beta                 98.806(1)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   13.6063(2)
_cell_length_b                   9.6562(1)
_cell_length_c                   14.2364(3)
_cell_measurement_reflns_used    18111
_cell_measurement_temperature    150
_cell_measurement_theta_max      72.15
_cell_measurement_theta_min      3.14
_cell_volume                     1848.40(5)
_computing_cell_refinement       'SAINT V7.34A(Bruker AXS, 2007)'
_computing_data_collection       'APEX2  (Bruker AXS, 2008)'
_computing_data_reduction        'SAINT V7.34A(Bruker AXS, 2007)'
_computing_molecular_graphics    'SHELXTL v6.12 (Bruker AXS, 2001)'
_computing_publication_material  'UdMX (Maris, 2004)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      150
_diffrn_detector_area_resol_mean 5.5
_diffrn_measured_fraction_theta_full 0.967
_diffrn_measured_fraction_theta_max 0.967
_diffrn_measurement_device_type  'Bruker Smart 6000'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  'Montel 200 optics'
_diffrn_radiation_source         'Rotating Anode'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.035
_diffrn_reflns_av_sigmaI/netI    0.0316
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            24075
_diffrn_reflns_theta_full        72.37
_diffrn_reflns_theta_max         72.37
_diffrn_reflns_theta_min         3.14
_exptl_absorpt_coefficient_mu    1.232
_exptl_absorpt_correction_T_max  0.8733
_exptl_absorpt_correction_T_min  0.7949
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Sadabs (Sheldrick, 2007)'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.211
_exptl_crystal_description       block
_exptl_crystal_F_000             724
_exptl_crystal_size_max          0.18
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.11
_refine_diff_density_max         0.211
_refine_diff_density_min         -0.245
_refine_diff_density_rms         0.062
_refine_ls_abs_structure_details 'Flack H D (1983), 3118 Friedel Pairs'
_refine_ls_abs_structure_Flack   0.002(13)
_refine_ls_extinction_coef       0.0201(6)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.075
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     434
_refine_ls_number_reflns         7006
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.075
_refine_ls_R_factor_all          0.0322
_refine_ls_R_factor_gt           0.0319
_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^)+(0.0536P)^2^+0.0999P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0794
_refine_ls_wR_factor_ref         0.0797
_reflns_number_gt                6905
_reflns_number_total             7006
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            jo301638z_si_003.cif
_cod_data_source_block           bent12
_cod_database_code               4027636