Enantioselective total synthesis of (+)-galbulin via organocatalytic domino Michael-Michael-aldol condensation
Bor-Cherng Hong; Che-Sheng Hsu; Gene-Hsiang Lee; Chem.Commun. 48 (2012) 2385–; doi:10.1039/c2cc16682h

data_7107401
_publ_section_title
;
 Enantioselective total synthesis of (+)-galbulin via organocatalytic
 domino Michael-Michael-aldol condensation
;
_journal_name_full               Chem.Commun.
_journal_page_first              2385
_journal_paper_doi               10.1039/c2cc16682h
_journal_volume                  48
_journal_year                    2012
_chemical_absolute_configuration ad
_chemical_formula_sum            'C20 H25 O4.5'
_chemical_formula_weight         337.40
_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                90.00
_cell_angle_beta                 111.551(1)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.2097(7)
_cell_length_b                   8.5716(5)
_cell_length_c                   17.6477(9)
_cell_measurement_reflns_used    2339
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      19.64
_cell_measurement_theta_min      2.43
_cell_volume                     1858.52(17)
_computing_cell_refinement       'Bruker SAINT'
_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      295(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'BRUKER SMART APEXCCD area detector'
_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  0.0397
_diffrn_reflns_av_sigmaI/netI    0.0657
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            18649
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         1.24
_exptl_absorpt_coefficient_mu    0.084
_exptl_absorpt_correction_T_max  0.9916
_exptl_absorpt_correction_T_min  0.9590
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.206
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             724
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.155
_refine_diff_density_min         -0.153
_refine_diff_density_rms         0.030
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.3(11)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.042
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     448
_refine_ls_number_reflns         8488
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.042
_refine_ls_R_factor_all          0.1072
_refine_ls_R_factor_gt           0.0627
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0463P)^2^+0.0828P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1149
_refine_ls_wR_factor_ref         0.1334
_reflns_number_gt                5384
_reflns_number_total             8488
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2cc16682h.txt
_cod_data_source_block           ic14155
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not_measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_sg_symbol_H-M      P2(1)
_cod_original_formula_sum        'C20 H25 O4.50'
_cod_database_code               7107401