Studies on c20-diterpenoid alkaloids: synthesis of the hetidine framework and its application to the synthesis of dihydronavirine and the atisine skeleton.
Hamlin, Amy M.; Lapointe, David; Owens, Kyle; Sarpong, Richmond; The Journal of organic chemistry 79 (2014) 6783–6800; doi:10.1021/jo501214b

data_4029687
_publ_section_title
;
 Studies on c20-diterpenoid alkaloids: synthesis of the hetidine framework
 and its application to the synthesis of dihydronavirine and the atisine
 skeleton.
;
_journal_issue                   15
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              6783
_journal_page_last               6800
_journal_paper_doi               10.1021/jo501214b
_journal_volume                  79
_journal_year                    2014
_chemical_absolute_configuration ad
_chemical_formula_sum            'C21 H31 N O4'
_chemical_formula_weight         361.47
_chemical_name_common            AMHXI-049
_chemical_name_systematic
; 
 sarpong83 
;
_space_group.centring_type       P
_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'
_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     iterative
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2014
_cell_angle_alpha                90
_cell_angle_beta                 94.209(3)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   10.9297(3)
_cell_length_b                   7.3691(2)
_cell_length_c                   11.4432(4)
_cell_measurement_reflns_used    6679
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      67.99
_cell_measurement_theta_min      3.87
_cell_volume                     919.17(5)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    ORTEP-32
_computing_publication_material  WinGX
_computing_structure_refinement  SHELXL-2014
_computing_structure_solution    SHELXT
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 8.366
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0744
_diffrn_reflns_av_unetI/netI     0.0517
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_refln_scan_rate          10
_diffrn_refln_scan_width         2.0
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            22824
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.993
_diffrn_reflns_theta_full        67.000
_diffrn_reflns_theta_max         68.414
_diffrn_reflns_theta_min         3.873
_diffrn_source                   'microfocus rotating anode'
_exptl_absorpt_coefficient_mu    0.717
_exptl_absorpt_correction_T_max  0.929
_exptl_absorpt_correction_T_min  0.818
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.306
_exptl_crystal_description       needle
_exptl_crystal_F_000             392
_exptl_crystal_size_max          0.050
_exptl_crystal_size_mid          0.020
_exptl_crystal_size_min          0.010
_refine_diff_density_max         0.206
_refine_diff_density_min         -0.159
_refine_diff_density_rms         0.037
_refine_ls_abs_structure_details
; 
 Flack x determined using 1094 quotients [(I+)-(I-)]/[(I+)+(I-)] 
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259). 
;
_refine_ls_abs_structure_Flack   -0.16(18)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.034
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     239
_refine_ls_number_reflns         3360
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.034
_refine_ls_R_factor_all          0.0549
_refine_ls_R_factor_gt           0.0410
_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^)+(0.0307P)^2^+0.1802P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0791
_refine_ls_wR_factor_ref         0.0848
_reflns_Friedel_coverage         0.835
_reflns_Friedel_fraction_full    0.997
_reflns_Friedel_fraction_max     0.987
_reflns_number_gt                2820
_reflns_number_total             3360
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo501214b_si_002.cif
_cod_data_source_block           sarpong83
_cod_depositor_comments
;Adding full bibliography for 4029686--4029687.cif.

The following automatic conversions were performed:

'_space_group.centring_type' value 'primitive' was replaced with the
value 'P' as specified in the replacement file
'/home/antanas/src/cod-tools/trunk/data/replacement-values/replacement_values.lst'.

Automatic conversion script
Id: cif_fix_values 5642 2017-10-24 12:04:52Z antanas 
;
_cod_database_code               4029687
_shelx_estimated_absorpt_t_min   0.965
_shelx_estimated_absorpt_t_max   0.993
_shelxl_version_number           2014-3
_shelx_res_checksum              73083
_shelx_hkl_checksum              98325