Transformations of the 2,7-Seco Aspidosperma Alkaloid Leuconolam, Structure Revision of epi-Leuconolam, and Partial Syntheses of Leuconoxine and Leuconodines A and F.
Low, Yun-Yee; Hong, Fong-Jiao; Lim, Kuan-Hon; Thomas, Noel F.; Kam, Toh-Seok; Journal of natural products 77 (2014) 327–338; doi:10.1021/np400922x

data_1513365
_publ_section_title
;
 Transformations of the 2,7-Seco Aspidosperma Alkaloid Leuconolam,
 Structure Revision of epi-Leuconolam, and Partial Syntheses of
 Leuconoxine and Leuconodines A and F.
;
_journal_issue                   2
_journal_name_full               'Journal of natural products'
_journal_page_first              327
_journal_page_last               338
_journal_paper_doi               10.1021/np400922x
_journal_volume                  77
_journal_year                    2014
_chemical_absolute_configuration unk
_chemical_formula_moiety         'C19 H22 N2 O3'
_chemical_formula_sum            'C19 H22 N2 O3'
_chemical_formula_weight         326.39
_chemical_melting_point          524.1(10)
_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'
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             2012-09-11
_audit_creation_method
;
  Olex2 1.1
  (compiled Nov  1 2011 20:42:30, GUI svn.r3906)
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   9.6652(5)
_cell_length_b                   16.1799(9)
_cell_length_c                   21.1959(11)
_cell_measurement_reflns_used    9992
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      30.212
_cell_measurement_theta_min      2.297
_cell_volume                     3314.7(3)
_computing_data_reduction        'SAINT v7.68A (Bruker, 2009)'
_computing_molecular_graphics
;
O. V. Dolomanov, L. J. Bourhis, R. J. Gildea, J. A. K. Howard and H. Puschmann,
OLEX2: a complete structure solution, refinement and analysis program.
J. Appl. Cryst. (2009). 42, 339-341.
;
_computing_publication_material
;
O. V. Dolomanov, L. J. Bourhis, R. J. Gildea, J. A. K. Howard and H. Puschmann,
OLEX2: a complete structure solution, refinement and analysis program.
J. Appl. Cryst. (2009). 42, 339-341.
;
_computing_structure_refinement
;
XL, G.M. Sheldrick, Acta Cryst.
(2008). A64, 112-122
;
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.964
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'MO K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0352
_diffrn_reflns_av_unetI/netI     0.0242
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       30
_diffrn_reflns_limit_l_min       -29
_diffrn_reflns_number            36904
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         30.63
_diffrn_reflns_theta_min         1.58
_diffrn_source                   'fine-focus sealed tube'
_diffrn_source_current           30.0
_diffrn_source_power             1.5
_diffrn_source_voltage           50.0
_exptl_absorpt_coefficient_mu    0.089
_exptl_absorpt_correction_T_max  0.7461
_exptl_absorpt_correction_T_min  0.6732
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2008/1 (Bruker,2008) was used for absorption correction.
R(int) was 0.0594 before and 0.0465 after correction.
The Ratio of minimum to maximum transmission is 0.9023.
The \l/2 correction factor is 0.0015.
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.308
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             1392
_exptl_crystal_size_max          0.31
_exptl_crystal_size_mid          0.27
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.328
_refine_diff_density_min         -0.198
_refine_diff_density_rms         0.045
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.013
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     445
_refine_ls_number_reflns         5465
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.013
_refine_ls_R_factor_all          0.0409
_refine_ls_R_factor_gt           0.0356
_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^)+(0.0570P)^2^+0.4725P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0877
_refine_ls_wR_factor_ref         0.0905
_reflns_number_gt                4999
_reflns_number_total             5465
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            np400922x_si_004.cif
_cod_data_source_block           lyy_1469_raz_minor
_cod_depositor_comments
;
The following automatic conversions were performed:

'_chemical_melting_point' value '250-252 oC' was changed to
'524.1(10)' - it was converted from degrees Celsius(C) to Kelvins(K),
the average value was taken and precision was estimated.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 
;
_cod_database_code               1513365