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_1513361
_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, 0.33(O)'
_chemical_formula_sum            'C19 H22 Cl2 N2 O3'
_chemical_formula_weight         397.29
_chemical_melting_point          185.0(10)
_chemical_name_systematic
;
 ? 
;
_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             2012-09-12
_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            12
_cell_length_a                   7.1721(4)
_cell_length_b                   26.1619(13)
_cell_length_c                   27.9882(15)
_cell_measurement_reflns_used    2091
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      18.055
_cell_measurement_theta_min      2.317
_cell_volume                     5251.6(5)
_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      298.0
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'MO K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1619
_diffrn_reflns_av_unetI/netI     0.0915
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       26
_diffrn_reflns_limit_k_min       -25
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            27390
_diffrn_reflns_theta_full        20.90
_diffrn_reflns_theta_max         20.90
_diffrn_reflns_theta_min         1.07
_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    0.394
_exptl_absorpt_correction_T_max  0.9922
_exptl_absorpt_correction_T_min  0.7754
_exptl_crystal_density_diffrn    1.507
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             2496
_exptl_crystal_size_max          0.68
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.02
_refine_diff_density_max         1.690
_refine_diff_density_min         -0.527
_refine_diff_density_rms         0.204
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.903
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     659
_refine_ls_number_reflns         3177
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.903
_refine_ls_R_factor_all          0.1478
_refine_ls_R_factor_gt           0.1079
_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^)+(0.1000P)^2^+0.7524P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2836
_refine_ls_wR_factor_ref         0.3130
_reflns_number_gt                2196
_reflns_number_total             3177
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            np400922x_si_009.cif
_cod_data_source_block           lyy_2002_0m
_cod_depositor_comments
;
The following automatic conversions were performed:

'_chemical_melting_point' value '184-186' was changed to '185.0(10)'
- 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               1513361