Stereospecific Total Synthesis of the Indole Alkaloid Ervincidine. Establishment of the C-6 Hydroxyl Stereochemistry.
Rallapalli, Sundari K.; Namjoshi, Ojas A.; Tiruveedhula, V. V. N. Phani Babu; Deschamps, Jeffrey R.; Cook, James M.; The Journal of organic chemistry 79 (2014) 3776–3780; doi:10.1021/jo402692u

data_4029323
_publ_section_title
;
 Stereospecific Total Synthesis of the Indole Alkaloid Ervincidine.
 Establishment of the C-6 Hydroxyl Stereochemistry.
;
_journal_issue                   9
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              3776
_journal_page_last               3780
_journal_paper_doi               10.1021/jo402692u
_journal_volume                  79
_journal_year                    2014
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C19 H20 N2 O2'
_chemical_formula_sum            'C19 H20 N2 O2'
_chemical_formula_weight         308.37
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_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            4
_cell_length_a                   9.6247(4)
_cell_length_b                   11.6485(5)
_cell_length_c                   13.7072(5)
_cell_measurement_reflns_used    4264
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      23.23
_cell_measurement_theta_min      2.29
_cell_volume                     1536.76(11)
_computing_cell_refinement       'Bruker APEX2 v2008.4-0 (Bruker, 2007)'
_computing_data_collection       'Bruker APEX2 v2008.4-0 (Bruker, 2007)'
_computing_data_reduction
;
Bruker SAINT v7.53A (Bruker, 2007), Bruker XPREP v2008/2 (Bruker, 2007)
;
_computing_molecular_graphics    'Bruker SHELXTL v6.12 (Bruker, 2000b)'
_computing_publication_material  'Bruker SHELXTL v6.12 (Bruker, 2000b)'
_computing_structure_refinement  'Bruker SHELXTL v6.12 (Bruker, 2000b)'
_computing_structure_solution    'Bruker SHELXTL v6.12 (Bruker, 2000b)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Bruker SMART APEX II CCD'
_diffrn_measurement_method       '\w 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  0.0313
_diffrn_reflns_av_sigmaI/netI    0.0274
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            17885
_diffrn_reflns_theta_full        29.23
_diffrn_reflns_theta_max         29.23
_diffrn_reflns_theta_min         2.29
_exptl_absorpt_coefficient_mu    0.087
_exptl_absorpt_correction_T_max  0.9910
_exptl_absorpt_correction_T_min  0.9537
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS v2.10 (Bruker, 2000c)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.333
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rod
_exptl_crystal_F_000             656
_exptl_crystal_size_max          0.549
_exptl_crystal_size_mid          0.141
_exptl_crystal_size_min          0.104
_refine_diff_density_max         0.275
_refine_diff_density_min         -0.226
_refine_diff_density_rms         0.038
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.9(14)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.051
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     208
_refine_ls_number_reflns         4117
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.051
_refine_ls_R_factor_all          0.0560
_refine_ls_R_factor_gt           0.0441
_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^)+(0.0613P)^2^+0.1966P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1120
_refine_ls_wR_factor_ref         0.1197
_reflns_number_gt                3439
_reflns_number_total             4117
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            jo402692u_si_003.cif
_cod_data_source_block           cook106
_cod_depositor_comments
'Adding full bibliography for 4029322--4029323.cif.'
_cod_database_code               4029323