Stereoselective Synthesis of Isochromanones by an Asymmetric Ortho-Lithiation Strategy: Synthetic Access to the Isochromanone Core of the Ajudazols.
Essig, Sebastian; Menche, Dirk; The Journal of organic chemistry 81 (2016) 1943–1966; doi:10.1021/acs.joc.5b02781

data_4036562
_publ_section_title
;
 Stereoselective Synthesis of Isochromanones by an Asymmetric
 Ortho-Lithiation Strategy: Synthetic Access to the Isochromanone Core of
 the Ajudazols.
;
_journal_issue                   5
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              1943
_journal_page_last               1966
_journal_paper_doi               10.1021/acs.joc.5b02781
_journal_volume                  81
_journal_year                    2016
_chemical_absolute_configuration ad
_chemical_formula_sum            'C29 H52 N O4 Si'
_chemical_formula_weight         506.81
_chemical_name_common            '41 in manuscript'
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_symmetry_cell_setting           orthorhombic
_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            8
_cell_length_a                   11.4204(8)
_cell_length_b                   17.2635(13)
_cell_length_c                   33.066(3)
_cell_measurement_reflns_used    6993
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      19.68
_cell_measurement_theta_min      2.17
_cell_volume                     6519.2(9)
_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, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      200(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_source         'ImuS microsource'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0438
_diffrn_reflns_av_sigmaI/netI    0.0409
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       33
_diffrn_reflns_limit_l_min       -33
_diffrn_reflns_number            28366
_diffrn_reflns_theta_full        20.83
_diffrn_reflns_theta_max         20.83
_diffrn_reflns_theta_min         1.33
_exptl_absorpt_coefficient_mu    0.101
_exptl_absorpt_correction_T_max  0.9950
_exptl_absorpt_correction_T_min  0.9732
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
Sheldrick, G. M. (2008). <i>SADABS</i>. University of G\"ottingen, Germany.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.033
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             2232
_exptl_crystal_size_max          0.27
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.242
_refine_diff_density_min         -0.179
_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   0.07(17)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.047
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     649
_refine_ls_number_reflns         6816
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.047
_refine_ls_R_factor_all          0.0583
_refine_ls_R_factor_gt           0.0440
_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^)+(0.0450P)^2^+3.1343P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1004
_refine_ls_wR_factor_ref         0.1078
_reflns_number_gt                5732
_reflns_number_total             6816
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo5b02781_si_002.cif
_cod_data_source_block           se3
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_symmetry_cell_setting' value 'Orthorhombic' was changed
to 'orthorhombic' in accordance with the
/home/saulius/struct/COD-crude-data/automatic-downloads/DataCite-retrospective/ACS/depositions/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

Automatic conversion script
Id: cif_fix_values 6909 2019-04-08 15:41:33Z antanas 
;
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               4036562