One-Pot Aldol Cascade for the Preparation of Isospiropyrans, Flavylium Salts and bis-Spiropyrans.
Neal, Taylor A.; Eippert, Allyson B.; Chivington, Austin; Jamison, Andrew; Chukwuma, Chukwunalu; Moore, Curtis E.; Neal, Jennifer F.; Allen, Heather C.; Wysocki, Laura M.; Paul, Noel Michael; Badjic, Jovica D.; The Journal of organic chemistry  (2020) –; doi:10.1021/acs.joc.0c00825

data_4038479
_publ_section_title
;
 One-Pot Aldol Cascade for the Preparation of Isospiropyrans, Flavylium
 Salts and bis-Spiropyrans.
;
_journal_name_full               'The Journal of organic chemistry'
_journal_paper_doi               10.1021/acs.joc.0c00825
_journal_year                    2020
_chemical_formula_moiety         'C18 H18 O3'
_chemical_formula_sum            'C18 H18 O3'
_chemical_formula_weight         282.32
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_atom_sites_solution_secondary   difmap
_audit_creation_date             2020-03-18
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_cell_angle_alpha                90
_cell_angle_beta                 99.627(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   10.5278(6)
_cell_length_b                   12.1806(6)
_cell_length_c                   11.4454(6)
_cell_measurement_reflns_used    2904
_cell_measurement_temperature    100
_cell_measurement_theta_max      26.344
_cell_measurement_theta_min      2.954
_cell_volume                     1447.03(13)
_computing_cell_refinement       'SAINT V8.38A (Bruker, 2017)'
_computing_data_collection       'APEX3 v2017.3-0 (Bruker, 2017)'
_computing_data_reduction        'SAINT V8.38A (Bruker, 2017)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      100
_diffrn_detector                 'Bruker Photon II area detector'
_diffrn_detector_area_resol_mean 10.5
_diffrn_detector_type            'CMOS area detector'
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device       'Kappa Four-Circle Diffractometer'
_diffrn_measurement_device_type  'Bruker D8 Venture'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_monochromator  'Curved-Graphite, Bruker TRIUMPH'
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0743
_diffrn_reflns_av_unetI/netI     0.0466
_diffrn_reflns_Laue_measured_fraction_full 0.997
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            17236
_diffrn_reflns_point_group_measured_fraction_full 0.997
_diffrn_reflns_point_group_measured_fraction_max 0.997
_diffrn_reflns_theta_full        25.000
_diffrn_reflns_theta_max         26.382
_diffrn_reflns_theta_min         2.953
_diffrn_source                   'sealed tube'
_diffrn_source_type              fine-focus
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.087
_exptl_absorpt_correction_T_max  0.2602
_exptl_absorpt_correction_T_min  0.2161
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2016/2 (Bruker,2016/2) was used for absorption correction. wR2(int) was 0.0632 before and 0.0573 after correction. The Ratio of minimum to maximum transmission is 0.8305. The \l/2 correction factor is Not present.'
_exptl_crystal_colour            Colorless
_exptl_crystal_colour_primary    Colorless
_exptl_crystal_density_diffrn    1.296
_exptl_crystal_description       Block
_exptl_crystal_F_000             600
_exptl_crystal_size_max          0.154
_exptl_crystal_size_mid          0.138
_exptl_crystal_size_min          0.127
_refine_diff_density_max         0.217
_refine_diff_density_min         -0.235
_refine_diff_density_rms         0.051
_refine_ls_extinction_coef       0.021(4)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2018/3 (Sheldrick 2018)'
_refine_ls_goodness_of_fit_ref   1.066
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     195
_refine_ls_number_reflns         2954
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.066
_refine_ls_R_factor_all          0.0918
_refine_ls_R_factor_gt           0.0457
_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^)+(0.0676P)^2^+0.3478P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1092
_refine_ls_wR_factor_ref         0.1402
_reflns_Friedel_coverage         0.000
_reflns_number_gt                1938
_reflns_number_total             2954
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo0c00825_si_004.cif
_cod_data_source_block           Badjic_TN_TetramerDecomp
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_diffrn_radiation_probe' value 'X-ray' was changed to
'x-ray' in accordance with the
/home/data/users/saulius/crontab/automatic-downloads/rss-feeds/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

Automatic conversion script
Id: cif_fix_values 7556 2019-12-06 15:28:31Z antanas 
;
_cod_database_code               4038479
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.989
_shelx_estimated_absorpt_t_min   0.987
_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, All O(H) groups
2.a Secondary CH2 refined with riding coordinates:
 C8(H8A,H8B)
2.b Aromatic/amide H refined with riding coordinates:
 C2(H2), C4(H4), C5(H5), C12(H12), C14(H14), C15(H15)
2.c Idealised Me refined as rotating group:
 C16(H16A,H16B,H16C), C17(H17A,H17B,H17C), C18(H18A,H18B,H18C)
2.d Idealised tetrahedral OH refined as rotating group:
 O3(H3)
;
_shelx_res_checksum              64827
_shelx_hkl_checksum              56913
_olex2_submission_special_instructions 'No special instructions were received'