Asymmetric total synthesis of Apocynaceae hydrocarbazole alkaloids (+)-deethylibophyllidine and (+)-limaspermidine.
Du, Ji-Yuan; Zeng, Chao; Han, Xiao-Jie; Qu, Hu; Zhao, Xian-He; An, Xian-Tao; Fan, Chun-An; Journal of the American Chemical Society 137 (2015) 4267–4273; doi:10.1021/jacs.5b01926

data_4129403
_publ_section_title
;
 Asymmetric total synthesis of Apocynaceae hydrocarbazole alkaloids
 (+)-deethylibophyllidine and (+)-limaspermidine.
;
_journal_issue                   12
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              4267
_journal_page_last               4273
_journal_paper_doi               10.1021/jacs.5b01926
_journal_volume                  137
_journal_year                    2015
_chemical_absolute_configuration unk
_chemical_formula_moiety         'C16 H16 N2 O2'
_chemical_formula_sum            'C16 H16 N2 O2'
_chemical_formula_weight         268.31
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             2013-12-16
_audit_creation_method
;
Olex2 1.2
(compiled 2013.12.10 svn.r2850 for OlexSys, GUI svn.r4736)
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.13784(15)
_cell_length_b                   10.2608(2)
_cell_length_c                   15.6066(3)
_cell_measurement_reflns_used    4378
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      70.6340
_cell_measurement_theta_min      4.2830
_cell_volume                     1303.16(4)
_computing_cell_refinement
;
CrysAlisPro, Agilent Technologies,
Version 1.171.36.28 (release 01-02-2013 CrysAlis171 .NET)
(compiled Feb  1 2013,16:14:44)
;
_computing_data_collection
;
CrysAlisPro, Agilent Technologies,
Version 1.171.36.28 (release 01-02-2013 CrysAlis171 .NET)
(compiled Feb  1 2013,16:14:44)
;
_computing_data_reduction
;
CrysAlisPro, Agilent Technologies,
Version 1.171.36.28 (release 01-02-2013 CrysAlis171 .NET)
(compiled Feb  1 2013,16:14:44)
;
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2008)'
_computing_structure_solution    'ShelXS (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 16.0733
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at zero, Eos'
_diffrn_measurement_method       '\w scans'
_diffrn_orient_matrix_UB_11      0.1731170000
_diffrn_orient_matrix_UB_12      0.0503838000
_diffrn_orient_matrix_UB_13      -0.0223552000
_diffrn_orient_matrix_UB_21      0.0134288000
_diffrn_orient_matrix_UB_22      0.0625577000
_diffrn_orient_matrix_UB_23      0.0894381000
_diffrn_orient_matrix_UB_31      0.0754669000
_diffrn_orient_matrix_UB_32      -0.1268707000
_diffrn_orient_matrix_UB_33      0.0352195000
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0258
_diffrn_reflns_av_unetI/netI     0.0268
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            5868
_diffrn_reflns_theta_full        70.00
_diffrn_reflns_theta_max         70.63
_diffrn_reflns_theta_min         5.16
_diffrn_source                   'SuperNova (Cu) X-ray Source'
_exptl_absorpt_coefficient_mu    0.738
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.68061
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.36.28 (release 01-02-2013 CrysAlis171 .NET)
(compiled Feb  1 2013,16:14:44)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            'clear light colourless'
_exptl_crystal_density_diffrn    1.368
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             568
_exptl_crystal_size_max          0.41
_exptl_crystal_size_mid          0.34
_exptl_crystal_size_min          0.29
_refine_diff_density_max         0.210
_refine_diff_density_min         -0.176
_refine_diff_density_rms         0.044
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.1(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.003
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     193
_refine_ls_number_reflns         2466
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.003
_refine_ls_R_factor_all          0.0355
_refine_ls_R_factor_gt           0.0351
_refine_ls_shift/su_max          0.012
_refine_ls_shift/su_mean         0.002
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0763P)^2^+0.1184P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0945
_refine_ls_wR_factor_ref         0.0950
_reflns_number_gt                2441
_reflns_number_total             2466
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja5b01926_si_001.cif
_cod_data_source_block           dujyuan_1214_cu150k
_cod_original_cell_volume        1303.17(4)
_cod_database_code               4129403
_reflns_odcompleteness_completeness 93.49
_reflns_odcompleteness_iscentric 1
_reflns_odcompleteness_theta     74.33
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
2.a Ternary CH refined with riding coordinates:
 C5(H5)
2.b Secondary CH2 refined with riding coordinates:
 C4(H4A,H4B), C7(H7A,H7B), C9(H9A,H9B), C10(H10A,H10B)
2.c Aromatic/amide H refined with riding coordinates:
 C12(H12), C13(H13), C14(H14), C15(H15)
;