Michael Addition-Lactonization of Arylacetyl Phosphonate to β,γ-Unsaturated α-Keto Esters for the Synthesis of Chiral syn-3,4-Dihydropyranones and 5,6-Dihydropyranones.
Zhang, Ming-Liang; Wu, Zhi-Jun; Zhao, Jian-Qiang; Luo, Yuan; Xu, Xiao-Ying; Zhang, Xiao-Mei; Yuan, Wei-Cheng; Organic letters 18 (2016) 5110–5113; doi:10.1021/acs.orglett.6b02558

data_1555816
_publ_section_title
;
 Michael Addition-Lactonization of Arylacetyl Phosphonate to
 \b,\g-Unsaturated \a-Keto Esters for the Synthesis of Chiral
 syn-3,4-Dihydropyranones and 5,6-Dihydropyranones.
;
_journal_issue                   19
_journal_name_full               'Organic letters'
_journal_page_first              5110
_journal_page_last               5113
_journal_paper_doi               10.1021/acs.orglett.6b02558
_journal_volume                  18
_journal_year                    2016
_chemical_formula_moiety         'C20 H17 Cl O4'
_chemical_formula_sum            'C20 H17 Cl O4'
_chemical_formula_weight         356.79
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/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                 96.9600(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.2163(6)
_cell_length_b                   23.306(2)
_cell_length_c                   11.8875(12)
_cell_measurement_reflns_used    9967
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      30.67
_cell_measurement_theta_min      2.46
_cell_volume                     1709.5(3)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.966
_diffrn_measured_fraction_theta_max 0.966
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_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  0.0249
_diffrn_reflns_av_sigmaI/netI    0.0220
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       31
_diffrn_reflns_limit_k_min       -32
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            17870
_diffrn_reflns_theta_full        29.99
_diffrn_reflns_theta_max         29.99
_diffrn_reflns_theta_min         1.75
_exptl_absorpt_coefficient_mu    0.245
_exptl_absorpt_correction_T_max  0.9190
_exptl_absorpt_correction_T_min  0.8336
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.386
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             744
_exptl_crystal_size_max          0.77
_exptl_crystal_size_mid          0.62
_exptl_crystal_size_min          0.35
_refine_diff_density_max         0.444
_refine_diff_density_min         -0.323
_refine_diff_density_rms         0.068
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.092
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     227
_refine_ls_number_reflns         4816
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.092
_refine_ls_R_factor_all          0.0433
_refine_ls_R_factor_gt           0.0393
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0536P)^2^+0.6611P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1041
_refine_ls_wR_factor_ref         0.1069
_reflns_number_gt                4403
_reflns_number_total             4816
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol6b02558_si_003.cif
_cod_data_source_block           mo_wlx_zml1_0m
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_symmetry_cell_setting' value 'Monoclinic' was changed to
'monoclinic' in accordance with the
/home/saulius/struct/COD-crude-data/automatic-downloads/DataCite-retrospective/ACS/depositions/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 6909 2019-04-08 15:41:33Z antanas 
;
_cod_original_cell_volume        1709.6(3)
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               1555816