Nucleophile-Mediated Ring Expansion of 5-Acyl-substituted 4-Mesyloxymethyl-1,2,3,4-tetrahydropyrimidin-2-ones in the Synthesis of 7-Membered Analogues of Biginelli Compounds and Related Heterocycles.
Fesenko, Anastasia A.; Grigoriev, Mikhail S.; Shutalev, Anatoly D.; The Journal of organic chemistry 82 (2017) 8085–8110; doi:10.1021/acs.joc.7b01348

data_4037519
_publ_section_title
;
 Nucleophile-Mediated Ring Expansion of 5-Acyl-substituted
 4-Mesyloxymethyl-1,2,3,4-tetrahydropyrimidin-2-ones in the Synthesis of
 7-Membered Analogues of Biginelli Compounds and Related Heterocycles.
;
_journal_issue                   15
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              8085
_journal_page_last               8110
_journal_paper_doi               10.1021/acs.joc.7b01348
_journal_volume                  82
_journal_year                    2017
_chemical_formula_sum            'C12 H20 N2 O4'
_chemical_formula_weight         256.30
_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   mixed
_audit_creation_method           SHELXL-2014
_cell_angle_alpha                90
_cell_angle_beta                 108.1020(10)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   8.3266(2)
_cell_length_b                   20.7583(5)
_cell_length_c                   7.9994(2)
_cell_measurement_reflns_used    5839
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      30.03
_cell_measurement_theta_min      3.32
_cell_volume                     1314.23(6)
_computing_structure_refinement  'SHELXL-2014 (Sheldrick, 2015)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.987
_diffrn_measurement_device_type
'Bruker KAPPA APEX II area-detector diffractometer'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0216
_diffrn_reflns_av_unetI/netI     0.0218
_diffrn_reflns_Laue_measured_fraction_full 0.992
_diffrn_reflns_Laue_measured_fraction_max 0.987
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       29
_diffrn_reflns_limit_k_min       -27
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            14630
_diffrn_reflns_point_group_measured_fraction_full 0.992
_diffrn_reflns_point_group_measured_fraction_max 0.987
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         29.998
_diffrn_reflns_theta_min         4.266
_exptl_absorpt_coefficient_mu    0.097
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.295
_exptl_crystal_description       fragment
_exptl_crystal_F_000             552
_exptl_crystal_size_max          0.500
_exptl_crystal_size_mid          0.500
_exptl_crystal_size_min          0.400
_refine_diff_density_max         0.382
_refine_diff_density_min         -0.212
_refine_diff_density_rms         0.043
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.032
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     171
_refine_ls_number_reflns         3791
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.032
_refine_ls_R_factor_all          0.0442
_refine_ls_R_factor_gt           0.0364
_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^)+(0.0491P)^2^+0.3356P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0917
_refine_ls_wR_factor_ref         0.0962
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3248
_reflns_number_total             3791
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo7b01348_si_002.cif
_cod_data_source_block           21b
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4037519
_shelx_estimated_absorpt_t_min   0.953
_shelx_estimated_absorpt_t_max   0.962
_shelxl_version_number           2014-3
_shelx_res_checksum              12843
_shelx_hkl_checksum              83454