Concise total synthesis of the cage-like sesquiterpenoid (+)-daphnepapytone A
Gonzalez, Elijah C.; de la Torre Roehl, Isabel M.; Stoltz, Brian M.; Chemical Science 16 (2025) 11381–11385; doi:10.1039/D5SC02952J

data_1574798
_publ_section_title
;
 Concise total synthesis of the cage-like sesquiterpenoid
 (+)-daphnepapytone A
;
_journal_issue                   25
_journal_name_full               'Chemical Science'
_journal_page_first              11381
_journal_page_last               11385
_journal_paper_doi               10.1039/D5SC02952J
_journal_volume                  16
_journal_year                    2025
_chemical_absolute_configuration ad
_chemical_formula_sum            'C14 H18 O'
_chemical_formula_weight         202.28
_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   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2019/1
_audit_update_record
;
2025-03-18 deposited with the CCDC.	2025-06-04 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90.016(6)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   13.8273(10)
_cell_length_b                   7.3520(6)
_cell_length_c                   11.6565(10)
_cell_measurement_reflns_used    9048
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      74.61
_cell_measurement_theta_min      3.20
_cell_volume                     1184.98(16)
_computing_cell_refinement       'SAINT v8.40A (Bruker-AXS, 2013)'
_computing_data_collection       'APEX3 v2019.11-0 (Bruker Nano, 2020)'
_computing_data_reduction        'SAINT v8.40A (Bruker-AXS, 2013)'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2019/1 (Sheldrick, 2019)'
_computing_structure_solution    'SHELXS-2013/1 (Sheldrick, 2015)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 7.69
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker D8 VENTURE Kappa Duo PHOTON II CPAD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0512
_diffrn_reflns_av_unetI/netI     0.0269
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            36338
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.996
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         74.600
_diffrn_reflns_theta_min         3.196
_diffrn_source                   'I\mS HB micro-focus sealed tube'
_exptl_absorpt_coefficient_mu    0.531
_exptl_absorpt_correction_T_max  0.7538
_exptl_absorpt_correction_T_min  0.6709
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS-2016/2 (Sheldrick, 2014)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.134
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             440
_exptl_crystal_size_max          0.250
_exptl_crystal_size_mid          0.200
_exptl_crystal_size_min          0.100
_refine_diff_density_max         0.164
_refine_diff_density_min         -0.149
_refine_diff_density_rms         0.035
_refine_ls_abs_structure_details
; 
 Flack x determined using 2206 quotients [(I+)-(I-)]/[(I+)+(I-)] 
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259). 
;
_refine_ls_abs_structure_Flack   -0.13(8)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.053
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     278
_refine_ls_number_reflns         4860
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.053
_refine_ls_R_factor_all          0.0264
_refine_ls_R_factor_gt           0.0258
_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^)+(0.0443P)^2^+0.0461P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0652
_refine_ls_wR_factor_ref         0.0654
_reflns_Friedel_coverage         0.845
_reflns_Friedel_fraction_full    0.999
_reflns_Friedel_fraction_max     0.993
_reflns_number_gt                4831
_reflns_number_total             4860
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d5sc02952j2.cif
_cod_data_source_block           V24096
_cod_depositor_comments
'Adding full bibliography for 1574798--1574800.cif.'
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               1574798
_shelx_shelxl_version_number     2019/1
_shelx_estimated_absorpt_t_min   0.879
_shelx_estimated_absorpt_t_max   0.949
_shelx_res_checksum              56152