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_4037521
_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            'C8 H10 N2 O2'
_chemical_formula_weight         166.18
_space_group_crystal_system      monoclinic
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 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                 123.025(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   18.0896(9)
_cell_length_b                   6.6427(4)
_cell_length_c                   15.8147(8)
_cell_measurement_reflns_used    1321
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      29.81
_cell_measurement_theta_min      2.77
_cell_volume                     1593.32(16)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device_type
'Bruker KAPPA APEX II area-detector diffractometer'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0563
_diffrn_reflns_limit_h_max       25
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       0
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            4014
_diffrn_reflns_theta_full        29.99
_diffrn_reflns_theta_max         29.99
_diffrn_reflns_theta_min         4.51
_exptl_absorpt_coefficient_mu    0.102
_exptl_absorpt_correction_T_max  0.9859
_exptl_absorpt_correction_T_min  0.9566
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.386
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       fragment
_exptl_crystal_F_000             704
_exptl_crystal_size_max          0.44
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.409
_refine_diff_density_min         -0.343
_refine_diff_density_rms         0.066
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.992
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     111
_refine_ls_number_reflns         4014
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.992
_refine_ls_R_factor_all          0.1058
_refine_ls_R_factor_gt           0.0579
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0887P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1402
_refine_ls_wR_factor_ref         0.1645
_reflns_number_gt                2456
_reflns_number_total             4014
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo7b01348_si_002.cif
_cod_data_source_block           33f
_cod_original_cell_volume        1593.32(15)
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               4037521