Chloroformate-mediated ring cleavage of indole alkaloids leads to re-engineered antiplasmodial agents.
Schultz, Daniel C.; Chávez-Riveros, Alejandra; Goertzen, 2nd, Michael G; Brummel, Beau R.; Paes, Raphaella A.; Santos, Natalia M.; Tenneti, Srinivasarao; Abboud, Khalil A.; Rocca, James R.; Seabra, Gustavo; Li, Chenglong; Chakrabarti, Debopam; Huigens, 3rd, Robert W; Organic & biomolecular chemistry 22 (2024) 8423–8436; doi:10.1039/d4ob00853g

data_7160014
_publ_section_title
;
 Chloroformate-mediated ring cleavage of indole alkaloids leads to
 re-engineered antiplasmodial agents.
;
_journal_issue                   42
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              8423
_journal_page_last               8436
_journal_paper_doi               10.1039/d4ob00853g
_journal_volume                  22
_journal_year                    2024
_chemical_absolute_configuration ad
_chemical_formula_sum            'C37 H39 Cl6 I N2 O6'
_chemical_formula_weight         947.30
_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'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2024-03-08 deposited with the CCDC.	2024-06-12 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 98.2052(11)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   12.0982(7)
_cell_length_b                   9.7700(6)
_cell_length_c                   16.9810(10)
_cell_measurement_reflns_used    9931
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28.0
_cell_measurement_theta_min      2.0
_cell_volume                     1986.6(2)
_computing_cell_refinement       'Bruker APEX3 (Bruker, 2014)'
_computing_data_collection       'Bruker APEX3 (Bruker, 2014)'
_computing_data_reduction        'Bruker Apex3 SAINT (Bruker, 2014)'
_computing_molecular_graphics    'XP in SHELXTL-plus, Bruker 2014'
_computing_publication_material  'SHELXL2014/7, Sheldrick, G. M. 2014'
_computing_structure_refinement  'SHELXL2014/7, Sheldrick G. M. 2014'
_computing_structure_solution    'SHELXL2014/7, Sheldrick G. M. 2014'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker APEX-II DUO'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0374
_diffrn_reflns_av_unetI/netI     0.0402
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            38673
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 1.000
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.500
_diffrn_reflns_theta_min         1.212
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    1.257
_exptl_absorpt_correction_T_max  0.9202
_exptl_absorpt_correction_T_min  0.7697
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'based on measured indexed crystal faces, Bruker APEX3 (Bruker, 2014)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.584
_exptl_crystal_description       block
_exptl_crystal_F_000             956
_exptl_crystal_size_max          0.334
_exptl_crystal_size_mid          0.239
_exptl_crystal_size_min          0.097
_refine_diff_density_max         0.688
_refine_diff_density_min         -0.470
_refine_diff_density_rms         0.063
_refine_ls_abs_structure_details
; 
 Flack x determined using 3574 quotients [(I+)-(I-)]/[(I+)+(I-)] 
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259). 
;
_refine_ls_abs_structure_Flack   0.008(6)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.035
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     559
_refine_ls_number_reflns         9134
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.035
_refine_ls_R_factor_all          0.0346
_refine_ls_R_factor_gt           0.0272
_refine_ls_shift/su_max          0.108
_refine_ls_shift/su_mean         0.004
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0231P)^2^+0.2359P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0513
_refine_ls_wR_factor_ref         0.0532
_reflns_Friedel_coverage         0.889
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     1.000
_reflns_number_gt                8258
_reflns_number_total             9134
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d4ob00853g2.cif
_cod_data_source_block           Y-22
_cod_depositor_comments
'Adding full bibliography for 7160009--7160014.cif.'
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               7160014
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.679
_shelx_estimated_absorpt_t_max   0.888
_shelx_res_checksum              85373