Electroreductive Intermolecular Coupling of Uracils with Aromatic Ketones: Synthesis of 6-Substituted and cis-5,6-Disubstituted 5,6-Dihydro-1,3-dimethyluracils and Their Transformation to 6-Substituted 1,3-Dimethyluracils, trans-5,6-Disubstituted 5,6-Dihydro-1,3-dimethyluracils, and 4,5,5-Trisubstituted 3-Methyloxazolizin-2-ones.
Kise, Naoki; Hamada, Yusuke; Sakurai, Toshihiko; The Journal of organic chemistry 81 (2016) 5101–5119; doi:10.1021/acs.joc.6b00670

data_4036825
_publ_section_title
;
 Electroreductive Intermolecular Coupling of Uracils with Aromatic
 Ketones: Synthesis of 6-Substituted and cis-5,6-Disubstituted
 5,6-Dihydro-1,3-dimethyluracils and Their Transformation to 6-Substituted
 1,3-Dimethyluracils, trans-5,6-Disubstituted
 5,6-Dihydro-1,3-dimethyluracils, and 4,5,5-Trisubstituted
 3-Methyloxazolizin-2-ones.
;
_journal_issue                   12
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              5101
_journal_page_last               5119
_journal_paper_doi               10.1021/acs.joc.6b00670
_journal_volume                  81
_journal_year                    2016
_chemical_formula_moiety         'C22 H26 N2 O5'
_chemical_formula_sum            'C22 H26 N2 O5'
_chemical_formula_weight         398.45
_chemical_name_systematic
; 
1-((3R*,4R*)-2,2-bis(4-methoxyphenyl)-4-methyl-5-oxotetrahydrofuran-3-yl)-
1,3-dimethylurea
;
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yab'
_space_group_name_H-M_alt        'P 1 21/a 1'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yab'
_symmetry_space_group_name_H-M   'P 1 21/a 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 98.823(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.995(2)
_cell_length_b                   19.045(4)
_cell_length_c                   11.123(2)
_cell_measurement_reflns_used    6424
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      27.3
_cell_measurement_theta_min      3.2
_cell_volume                     2092.3(7)
_computing_cell_refinement       PROCESS-AUTO
_computing_data_collection       PROCESS-AUTO
_computing_data_reduction        PROCESS-AUTO
_computing_publication_material  yadokari-XG
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      298(2)
_diffrn_detector_area_resol_mean 10.00
_diffrn_measured_fraction_theta_full 0.987
_diffrn_measured_fraction_theta_max 0.987
_diffrn_measurement_device_type  'Rigaku RAXIS-RAPID'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71075
_diffrn_reflns_av_R_equivalents  0.0407
_diffrn_reflns_av_sigmaI/netI    0.0436
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -24
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            19996
_diffrn_reflns_theta_full        27.46
_diffrn_reflns_theta_max         27.46
_diffrn_reflns_theta_min         3.16
_exptl_absorpt_coefficient_mu    0.090
_exptl_absorpt_correction_T_max  0.9822
_exptl_absorpt_correction_T_min  0.9564
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
    Higashi, T. (1995). Program for Absorption Correction.
    Rigaku Corporation, Tokyo, Japan.
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.265
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             848
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.174
_refine_diff_density_min         -0.161
_refine_diff_density_rms         0.034
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.999
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     271
_refine_ls_number_reflns         4724
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.999
_refine_ls_R_factor_all          0.0917
_refine_ls_R_factor_gt           0.0446
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0500P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0922
_refine_ls_wR_factor_ref         0.1017
_reflns_number_gt                2780
_reflns_number_total             4724
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo6b00670_si_027.cif
_cod_data_source_block           trans-15j
_cod_original_cell_volume        2092.3(8)
_cod_original_sg_symbol_H-M      'P 21/a'
_cod_database_code               4036825