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_7160013
_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            'C30 H36 N2 O5 S'
_chemical_formula_weight         536.67
_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
;
2024-03-08 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                   9.7448(3)
_cell_length_b                   14.0034(5)
_cell_length_c                   19.6580(6)
_cell_measurement_reflns_used    9986
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      31.94
_cell_measurement_theta_min      2.33
_cell_volume                     2682.54(15)
_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 0.999
_diffrn_measured_fraction_theta_max 0.944
_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  0.0435
_diffrn_reflns_av_unetI/netI     0.0330
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.944
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       30
_diffrn_reflns_limit_l_min       -30
_diffrn_reflns_number            64890
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.917
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         33.272
_diffrn_reflns_theta_min         2.072
_diffrn_source                   'micro source 3.0'
_exptl_absorpt_coefficient_mu    0.164
_exptl_absorpt_correction_T_max  0.9948
_exptl_absorpt_correction_T_min  0.9780
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'Sheldrick, G. M., sadabs (2014). Acta Cryst. C71, 3--8.'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.329
_exptl_crystal_description       plate
_exptl_crystal_F_000             1144
_exptl_crystal_size_max          0.187
_exptl_crystal_size_mid          0.119
_exptl_crystal_size_min          0.046
_exptl_transmission_factor_max   0.5606
_exptl_transmission_factor_min   0.4909
_refine_diff_density_max         0.300
_refine_diff_density_min         -0.255
_refine_diff_density_rms         0.047
_refine_ls_abs_structure_details
; 
 Flack x determined using 3555 quotients [(I+)-(I-)]/[(I+)+(I-)] 
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259). 
;
_refine_ls_abs_structure_Flack   0.013(16)
_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     353
_refine_ls_number_reflns         9474
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.035
_refine_ls_R_factor_all          0.0372
_refine_ls_R_factor_gt           0.0322
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0443P)^2^+0.2927P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0763
_refine_ls_wR_factor_ref         0.0798
_reflns_Friedel_coverage         0.757
_reflns_Friedel_fraction_full    0.999
_reflns_Friedel_fraction_max     0.884
_reflns_number_gt                8697
_reflns_number_total             9474
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d4ob00853g2.cif
_cod_data_source_block           Y-24
_cod_depositor_comments
'Adding full bibliography for 7160009--7160014.cif.'
_cod_database_code               7160013
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_min   0.970
_shelx_estimated_absorpt_t_max   0.992
_shelx_res_checksum              88955
_publcif_funding_html
;
;