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_7160009
_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 syn
_chemical_formula_sum            'C24 H32 N2 O6'
_chemical_formula_weight         444.51
_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   mixed
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2018/3
_audit_update_record
;
2024-03-05 deposited with the CCDC.	2024-06-12 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   12.0273(3)
_cell_length_b                   13.1402(4)
_cell_length_c                   14.3337(4)
_cell_measurement_reflns_used    9979
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      29.73
_cell_measurement_theta_min      2.30
_cell_volume                     2265.31(11)
_computing_cell_refinement       'Bruker APEX3 (Bruker, 2019)'
_computing_data_collection       'Bruker APEX3 (Bruker, 2019)'
_computing_data_reduction        'Bruker Apex3 SAINT (Bruker, 2019)'
_computing_molecular_graphics    'XP in SHELXTL-plus, Bruker 2019'
_computing_publication_material  'SHELXL2015, Sheldrick, G. M. 2019'
_computing_structure_refinement  'SHELXL2015, Sheldrick G. M. 2019'
_computing_structure_solution    'SHELXL2015, Sheldrick G. M. 2019'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.929
_diffrn_measurement_device_type  'D8 Venture with PHOTON III'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0539
_diffrn_reflns_av_unetI/netI     0.0455
_diffrn_reflns_Laue_measured_fraction_full 0.997
_diffrn_reflns_Laue_measured_fraction_max 0.929
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            39670
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.893
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         32.798
_diffrn_reflns_theta_min         2.103
_diffrn_source                   'micro source 3.0'
_exptl_absorpt_coefficient_mu    0.094
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'Sheldrick, G. M., sadabs (2015). Acta Cryst. C71, 3-8.'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.303
_exptl_crystal_description       plate
_exptl_crystal_F_000             952
_exptl_crystal_size_max          0.262
_exptl_crystal_size_mid          0.205
_exptl_crystal_size_min          0.176
_exptl_transmission_factor_max   0.5657
_exptl_transmission_factor_min   0.5132
_refine_diff_density_max         0.285
_refine_diff_density_min         -0.226
_refine_diff_density_rms         0.045
_refine_ls_abs_structure_details
; 
 Flack x determined using 2412 quotients [(I+)-(I-)]/[(I+)+(I-)] 
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259). 
;
_refine_ls_abs_structure_Flack   0.1(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.073
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     297
_refine_ls_number_reflns         7501
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.073
_refine_ls_R_factor_all          0.0525
_refine_ls_R_factor_gt           0.0411
_refine_ls_shift/su_max          0.011
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0504P)^2^+0.0905P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0950
_refine_ls_wR_factor_ref         0.1010
_reflns_Friedel_coverage         0.732
_reflns_Friedel_fraction_full    0.999
_reflns_Friedel_fraction_max     0.847
_reflns_number_gt                6384
_reflns_number_total             7501
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d4ob00853g2.cif
_cod_data_source_block           Y-14
_cod_depositor_comments
'Adding full bibliography for 7160009--7160014.cif.'
_cod_database_code               7160009
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_min   0.976
_shelx_estimated_absorpt_t_max   0.984
_shelx_res_checksum              12668
_publcif_funding_html
;
;