Total Synthesis of Longeracinphyllin A.
Li, Jian; Zhang, Wenhao; Zhang, Fei; Chen, Yu; Li, Ang; Journal of the American Chemical Society 139 (2017) 14893–14896; doi:10.1021/jacs.7b09186

data_4131714
_publ_section_title
;
 Total Synthesis of Longeracinphyllin A.
;
_journal_issue                   42
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              14893
_journal_page_last               14896
_journal_paper_doi               10.1021/jacs.7b09186
_journal_volume                  139
_journal_year                    2017
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C18 H25 N O4'
_chemical_formula_sum            'C18 H25 N O4'
_chemical_formula_weight         319.39
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/7
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.1734(4)
_cell_length_b                   14.6205(9)
_cell_length_c                   15.2005(9)
_cell_measurement_reflns_used    9992
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      66.60
_cell_measurement_theta_min      3.02
_cell_volume                     1594.21(16)
_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-2014 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXS-97 (Sheldrick 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0271
_diffrn_reflns_av_unetI/netI     0.0176
_diffrn_reflns_Laue_measured_fraction_full 0.992
_diffrn_reflns_Laue_measured_fraction_max 0.992
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            15360
_diffrn_reflns_point_group_measured_fraction_full 0.994
_diffrn_reflns_point_group_measured_fraction_max 0.994
_diffrn_reflns_theta_full        66.688
_diffrn_reflns_theta_max         66.688
_diffrn_reflns_theta_min         4.195
_diffrn_source                   'sealed tube'
_exptl_absorpt_coefficient_mu    0.759
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.331
_exptl_crystal_description       block
_exptl_crystal_F_000             588
_exptl_crystal_size_max          0.05
_exptl_crystal_size_mid          0.04
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.197
_refine_diff_density_min         -0.231
_refine_diff_density_rms         0.041
_refine_ls_abs_structure_details
;
 Refined as an inversion twin.
;
_refine_ls_abs_structure_Flack   0.1(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.061
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     212
_refine_ls_number_reflns         2800
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.061
_refine_ls_R_factor_all          0.0307
_refine_ls_R_factor_gt           0.0305
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0448P)^2^+0.3172P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0781
_refine_ls_wR_factor_ref         0.0782
_reflns_Friedel_coverage         0.720
_reflns_Friedel_fraction_full    0.997
_reflns_Friedel_fraction_max     0.997
_reflns_number_gt                2774
_reflns_number_total             2800
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja7b09186_si_003.cif
_cod_data_source_block           a
_cod_database_code               4131714
_shelx_shelxl_version_number     2014/7
_shelx_res_checksum              24370
_shelx_hkl_checksum              56444