Development of a Modular Synthetic Route to (+)-Pleuromutilin, (+)-12-epi-Mutilins, and Related Structures.
Zeng, Mingshuo; Murphy, Stephen K.; Herzon, Seth B.; Journal of the American Chemical Society 139 (2017) 16377–16388; doi:10.1021/jacs.7b09869

data_4131741
_publ_section_title
;
 Development of a Modular Synthetic Route to (+)-Pleuromutilin,
 (+)-12-epi-Mutilins, and Related Structures.
;
_journal_issue                   45
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              16377
_journal_page_last               16388
_journal_paper_doi               10.1021/jacs.7b09869
_journal_volume                  139
_journal_year                    2017
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C14 H20 O3'
_chemical_formula_sum            'C14 H20 O3'
_chemical_formula_weight         236.30
_space_group_crystal_system      monoclinic
_space_group_IT_number           4
_space_group_name_Hall           'P 2yb'
_space_group_name_H-M_alt        'P 1 21 1'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2014/7
_cell_angle_alpha                90
_cell_angle_beta                 113.779(4)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   8.5539(6)
_cell_length_b                   7.6851(5)
_cell_length_c                   10.5736(7)
_cell_measurement_reflns_used    122
_cell_measurement_temperature    93(2)
_cell_measurement_theta_max      68.3
_cell_measurement_theta_min      4.6
_cell_volume                     636.08(8)
_computing_cell_refinement       'CrystalClear-SM Expert 2.0 r15 (Rigaku, 2011)'
_computing_data_collection       'CrystalClear-SM Expert 2.0 r15 (Rigaku, 2011)'
_computing_data_reduction        'CrystalClear-SM Expert 2.0 r15 (Rigaku, 2011)'
_computing_molecular_graphics
; 
Dolomanov, O.V.; Bourhis, L.J.; Gildea, R.J.; Howard, J.A.K.; Puschmann, H., 
OLEX2: A complete structure solution, refinement and analysis program 
(2009). J. Appl. Cryst., 42, 339-341. 
;
_computing_publication_material  'CIFTAB-2013/2 (Sheldrick, 2014)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXT-2014/5 (Sheldrick, 2014)'
_diffrn_ambient_temperature      93(2)
_diffrn_detector_area_resol_mean 22.2
_diffrn_measured_fraction_theta_full 0.982
_diffrn_measured_fraction_theta_max 0.973
_diffrn_measurement_device_type  'Rigaku Saturn 944+ CCD'
_diffrn_measurement_method       \w
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0608
_diffrn_reflns_av_unetI/netI     0.0276
_diffrn_reflns_Laue_measured_fraction_full 0.982
_diffrn_reflns_Laue_measured_fraction_max 0.973
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            22671
_diffrn_reflns_point_group_measured_fraction_full 0.979
_diffrn_reflns_point_group_measured_fraction_max 0.969
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         67.944
_diffrn_reflns_theta_min         4.570
_diffrn_source                   'Sealed Tube'
_exptl_absorpt_coefficient_mu    0.687
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.784
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Jacobson, R. (1998) Private Communication'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.234
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             256
_exptl_crystal_size_max          0.220
_exptl_crystal_size_mid          0.210
_exptl_crystal_size_min          0.150
_refine_diff_density_max         0.209
_refine_diff_density_min         -0.129
_refine_diff_density_rms         0.027
_refine_ls_abs_structure_details
; 
 Flack x determined using 1019 quotients [(I+)-(I-)]/[(I+)+(I-)] 
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259). 
;
_refine_ls_abs_structure_Flack   0.02(6)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.084
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     160
_refine_ls_number_reflns         2260
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.086
_refine_ls_R_factor_all          0.0274
_refine_ls_R_factor_gt           0.0272
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0385P)^2^+0.0744P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0716
_refine_ls_wR_factor_ref         0.0717
_reflns_Friedel_coverage         0.842
_reflns_Friedel_fraction_full    0.976
_reflns_Friedel_fraction_max     0.965
_reflns_number_gt                2237
_reflns_number_total             2260
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja7b09869_si_004.cif
_cod_data_source_block           007-16109
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               4131741
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.864
_shelx_estimated_absorpt_t_max   0.904
_shelx_res_checksum              22725
_shelx_hkl_checksum              2341