Asymmetric pyrone Diels–Alder reactions enabled by dienamine catalysis
Cole, Charles J. F.; Fuentes, Lilia; Snyder, Scott A.; Chemical Science 11 (2020) 2175–2180; doi:10.1039/C9SC05738B

data_1557123
_publ_section_title
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 Asymmetric pyrone Diels--Alder reactions enabled by dienamine catalysis
;
_journal_issue                   8
_journal_name_full               'Chemical Science'
_journal_page_first              2175
_journal_page_last               2180
_journal_paper_doi               10.1039/C9SC05738B
_journal_volume                  11
_journal_year                    2020
_chemical_formula_moiety         'C21 H20 O6'
_chemical_formula_sum            'C21 H20 O6'
_chemical_formula_weight         368.37
_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     dual
_atom_sites_solution_secondary   difmap
_audit_creation_date             2018-10-24
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2019-11-11 deposited with the CCDC.	2020-01-22 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   8.6977(4)
_cell_length_b                   9.9164(4)
_cell_length_c                   20.6241(9)
_cell_measurement_reflns_used    3731
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.10
_cell_measurement_theta_min      2.28
_cell_volume                     1778.83(13)
_computing_cell_refinement       'SAINT V.8.35A (Bruker AXS Inc., 2013)'
_computing_data_collection       'APEX3 v.2015.9-0 (Bruker AXS Inc., 2015)'
_computing_data_reduction        'SAINT V.8.35A (Bruker AXS Inc., 2013)'
_computing_molecular_graphics
;
OLEX2: a complete structure solution, refinement and analysis program 
Dolomanov et al., 2009

Mercury: visualization and analysis of crystal structures
Macrae, et al., 2006

O. V. Dolomanov, L. J. Bourhis, R. J. Gildea, J. A. K. Howard and H. Puschmann.
J. Appl. Cryst. (2009). 42, 339-341;

C. F. Macrae, P. R. Edgington, P. McCabe, E. Pidcock, G. P. Shields, R. Taylor,
M. Towler and J. van de Streek, J. Appl. Cryst. (2006). 39, 453-457.
;
_computing_publication_material
;
 APEX3 v.2015.5-2 (Bruker AXS Inc., 2015)
 OLEX2 (Dolomanov et al., 2009)
;
_computing_structure_refinement  'XL-2018/3 (Sheldrick, 2015b)'
_computing_structure_solution    'XT 2018/2 (Sheldrick, 2015a)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector                 'Bruker PHOTON 100'
_diffrn_detector_area_resol_mean 10.4167
_diffrn_detector_type            CMOS
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker D8 Venture'
_diffrn_measurement_method       'omega and phi scans'
_diffrn_radiation_monochromator  mirrors
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0480
_diffrn_reflns_av_unetI/netI     0.0908
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            6802
_diffrn_reflns_point_group_measured_fraction_full 0.992
_diffrn_reflns_point_group_measured_fraction_max 0.980
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.733
_diffrn_reflns_theta_min         2.279
_diffrn_source                   'micro-focus X-ray tube'
_diffrn_source_type              'INCOATEC ImuS'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.101
_exptl_absorpt_correction_T_max  0.7458
_exptl_absorpt_correction_T_min  0.6348
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2014/4 (Bruker,2014/4) was used for absorption correction. 
wR2(int) was 0.0905 before and 0.0437 after correction. 
The Ratio of minimum to maximum transmission is 0.8512. 
;
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.375
_exptl_crystal_description       block
_exptl_crystal_F_000             776
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.303
_refine_diff_density_min         -0.254
_refine_diff_density_rms         0.058
_refine_ls_abs_structure_details
;
 Flack x determined using 1142 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.040
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     254
_refine_ls_number_reflns         4513
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.040
_refine_ls_R_factor_all          0.0795
_refine_ls_R_factor_gt           0.0511
_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^)+(0.0368P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1017
_refine_ls_wR_factor_ref         0.1140
_reflns_Friedel_coverage         0.723
_reflns_Friedel_fraction_full    0.982
_reflns_Friedel_fraction_max     0.957
_reflns_number_gt                3440
_reflns_number_total             4513
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c9sc05738b2.cif
_cod_data_source_block           0692_cole
_cod_depositor_comments
;Adding full bibliography for 1557123--1557130.cif.

 Adding full bibliography for 1557123--1557130.cif.
;
_cod_database_code               1557123
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.982
_shelx_estimated_absorpt_t_min   0.972
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C8(H8), C10(H10), C12(H12)
2.b Secondary CH2 refined with riding coordinates:
 C17(H17A,H17B)
2.c Aromatic/amide H refined with riding coordinates:
 C2(H2), C3(H3), C4(H4), C5(H5), C13(H13), C18(H18), C19(H19)
2.d Idealised Me refined as rotating group:
 C16(H16A,H16B,H16C), C21(H21A,H21B,H21C)
;
_shelx_res_checksum              98530
_olex2_submission_special_instructions 'No special instructions were received'