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_4038481
_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         'C16 H13 O4, Cl'
_chemical_formula_sum            'C16 H13 Cl O4'
_chemical_formula_weight         304.71
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_atom_sites_solution_secondary   difmap
_audit_creation_date             2019-05-13
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_cell_angle_alpha                90
_cell_angle_beta                 101.031(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   5.9006(3)
_cell_length_b                   15.9293(9)
_cell_length_c                   14.4042(9)
_cell_measurement_reflns_used    9907
_cell_measurement_temperature    100.0
_cell_measurement_theta_max      26.341
_cell_measurement_theta_min      3.153
_cell_volume                     1328.87(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      100.0
_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 0.999
_diffrn_measured_fraction_theta_max 0.998
_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  0.0343
_diffrn_reflns_av_unetI/netI     0.0269
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            13855
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        25.000
_diffrn_reflns_theta_max         26.380
_diffrn_reflns_theta_min         2.882
_diffrn_source                   'sealed tube'
_diffrn_source_type              fine-focus
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.301
_exptl_absorpt_correction_T_max  0.2602
_exptl_absorpt_correction_T_min  0.2237
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2016/2 (Bruker,2016/2) was used for absorption correction. wR2(int) was 0.0625 before and 0.0569 after correction. The Ratio of minimum to maximum transmission is 0.8597. The \l/2 correction factor is Not present.'
_exptl_crystal_colour            Colorless
_exptl_crystal_colour_primary    Colorless
_exptl_crystal_density_diffrn    1.523
_exptl_crystal_description       Block
_exptl_crystal_F_000             632
_exptl_crystal_size_max          0.164
_exptl_crystal_size_mid          0.157
_exptl_crystal_size_min          0.148
_refine_diff_density_max         0.266
_refine_diff_density_min         -0.263
_refine_diff_density_rms         0.057
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.044
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     194
_refine_ls_number_reflns         2718
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.044
_refine_ls_R_factor_all          0.0450
_refine_ls_R_factor_gt           0.0323
_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^)+(0.0282P)^2^+1.1469P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0724
_refine_ls_wR_factor_ref         0.0809
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2250
_reflns_number_total             2718
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo0c00825_si_005.cif
_cod_data_source_block           Badjic_TN_0301Neat
_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               4038481
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.957
_shelx_estimated_absorpt_t_min   0.952
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
 At 1.5 times of:
  All C(H,H,H) groups, All O(H) groups
2.a Aromatic/amide H refined with riding coordinates:
 C2(H2), C4(H4A), C5(H5), C8(H8), C12(H12), C14(H14), C15(H15)
2.b Idealised Me refined as rotating group:
 C16(H16A,H16B,H16C)
2.c Idealised tetrahedral OH refined as rotating group:
 O1(H1), O3(H3), O4(H4)
;
_shelx_res_checksum              99798
_shelx_hkl_checksum              77693
_olex2_submission_special_instructions 'No special instructions were received'