Forwards and backwards – synthesis of Laurencia natural products using a biomimetic and retrobiomimetic strategy incorporating structural reassignment of laurefurenynes C–F
Chan, Hau Sun Sam; Thompson, Amber L.; Christensen, Kirsten E.; Burton, Jonathan W.; Chemical Science  (2020) –; doi:10.1039/D0SC04120C

data_1559304
_publ_section_title
;
 Forwards and backwards -- synthesis of Laurencia natural products using a
 biomimetic and retrobiomimetic strategy incorporating structural
 reassignment of laurefurenynes C--F
;
_journal_name_full               'Chemical Science'
_journal_paper_doi               10.1039/D0SC04120C
_journal_year                    2020
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C15 H22 O4'
_chemical_formula_sum            'C15 H22 O4'
_chemical_formula_weight         266.34
_chemical_melting_point          ?
_space_group_IT_number           4
_space_group_name_Hall           'P 2yb'
_space_group_name_H-M_alt        'P 1 21 1'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     other
_audit_creation_date             2018-07-05
_audit_creation_method           CRYSTALS_ver_14.61_build_6720
_audit_update_record
;
2020-05-21 deposited with the CCDC.	2020-09-25 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 97.424(3)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   5.8853(2)
_cell_length_b                   7.6219(2)
_cell_length_c                   16.1377(4)
_cell_measurement_reflns_used    6370
_cell_measurement_temperature    150
_cell_measurement_theta_max      76
_cell_measurement_theta_min      5
_cell_volume                     717.82(4)
_computing_cell_refinement
; 
 CrysAlisPro (Rigaku Oxford Diffraction, 2017) 
;
_computing_data_collection       'SuperNova, (Oxford Diffraction, 2010)'
_computing_data_reduction
; 
 CrysAlisPro (Rigaku Oxford Diffraction, 2017) 
;
_computing_molecular_graphics    'CAMERON (Watkin et al., 1996)'
_computing_publication_material  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_refinement  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_solution    'Superflip (Palatinus & Chapuis, 2007)'
_diffrn_ambient_temperature      150
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device       Area
_diffrn_measurement_device_type  'Oxford Diffraction SuperNova'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  'focussing mirrors'
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.051
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            11890
_diffrn_reflns_theta_full        74.645
_diffrn_reflns_theta_max         76.168
_diffrn_reflns_theta_min         5.529
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.719
_exptl_absorpt_correction_T_max  0.99
_exptl_absorpt_correction_T_min  0.53
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
; 
 CrysAlisPro (Rigaku Oxford Diffraction, 2017) 
;
_exptl_crystal_colour            clear_pale_colourless
_exptl_crystal_density_diffrn    1.232
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             287.998
_exptl_crystal_size_max          0.31
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.01
_refine_diff_density_max         0.30
_refine_diff_density_min         -0.17
_refine_ls_abs_structure_details
; 
 Parsons, Flack & Wagner (2013), 
 1143 Friedel Pairs 
;
_refine_ls_abs_structure_Flack   0.06(9)
_refine_ls_extinction_method     None
_refine_ls_goodness_of_fit_ref   1.0016
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     173
_refine_ls_number_reflns         2971
_refine_ls_number_restraints     1
_refine_ls_R_factor_all          0.0458
_refine_ls_R_factor_gt           0.0439
_refine_ls_shift/su_max          0.0001425
_refine_ls_shift/su_mean         0.0000267
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;
 Method= Modified Sheldrick 
 w=1/[\s^2^(F^2^) + ( 0.08P)^2^ + 0.14P] 
 ,where P=(max(Fo^2^,0) + 2Fc^2^)/3 
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1175
_refine_ls_wR_factor_gt          0.1151
_refine_ls_wR_factor_ref         0.1175
_reflns_limit_h_max              7
_reflns_limit_h_min              -7
_reflns_limit_k_max              9
_reflns_limit_k_min              -9
_reflns_limit_l_max              20
_reflns_limit_l_min              0
_reflns_number_gt                2828
_reflns_number_total             2974
_reflns_threshold_expression     I>2.0\s(I)
_oxford_diffrn_Wilson_B_factor   2.60
_oxford_diffrn_Wilson_scale      0.01
_oxford_refine_ls_r_factor_ref   0.0458
_oxford_refine_ls_scale          10.4(5)
_oxford_reflns_number_all        2971
_oxford_structure_analysis_title 6993
_cod_data_source_file            d0sc04120c2.cif
_cod_data_source_block           10
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_chemical_melting_point' value 'not measured' was changed
to '?' -- the value is undefined or not given.

data item '_exptl_crystal_density_meas' value 'not measured' was
changed to '?' -- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 7556 2019-12-06 15:28:31Z antanas 
;
_cod_original_sg_symbol_H-M      'P 21 '
_cod_database_code               1559304
_oxford_refine_reflns_threshold_expression_ref I>-10.0\s(I)
_oxford_refine_ls_r_factor_all   0.0458
_oxford_refine_ls_wr_factor_all  0.1175
_oxford_hooft_y                  -0.02(9)
_oxford_bijvoet_difference       0.06(9)
_oxford_refined_flack_x          0.03(19)