Proposed biogenetic origin of secu'amamine A from allosecurinine: a model study to support the intermediacy of the putative aziridinium ion.
Magnus, Philip; Padilla, Angela I.; Organic letters 8 (2006) 3569–3571; doi:10.1021/ol061391a

data_1506140
_publ_section_title
;
 Proposed biogenetic origin of secu'amamine A from allosecurinine: a model
 study to support the intermediacy of the putative aziridinium ion.
;
_journal_issue                   16
_journal_name_full               'Organic letters'
_journal_page_first              3569
_journal_page_last               3571
_journal_paper_doi               10.1021/ol061391a
_journal_volume                  8
_journal_year                    2006
_chemical_formula_sum            'C15 H21 N2 O5.5'
_chemical_formula_weight         317.34
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   '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                 99.1970(7)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   21.9440(4)
_cell_length_b                   9.1830(2)
_cell_length_c                   15.9020(4)
_cell_measurement_reflns_used    3605
_cell_measurement_temperature    153(2)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      3
_cell_volume                     3163.25(12)
_computing_cell_refinement       'Collect software, Nonius B.V. 1998'
_computing_data_collection       'Collect software, Nonius B.V. 1998'
_computing_data_reduction
;
DENZO and Scalepack (Otwinoski and Minor, 1997)
;
_computing_molecular_graphics    'XP SHELXTL/PC, Siemens Analytical'
_computing_structure_refinement  'XL SHELXTL/PC, Siemens Analytical'
_computing_structure_solution
;

SIR97 - Altomare A., Burla M.C., Camalli M., Cascarano G.L., Giacovazzo C., 
Guagliardi A., Moliterni A.G.G., Polidori G.,Spagna R.
;
_diffrn_ambient_temperature      153(2)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'Nonius Kappa CCD'
_diffrn_measurement_method       \w-scans
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71070
_diffrn_reflns_av_R_equivalents  0.0332
_diffrn_reflns_av_sigmaI/netI    0.0528
_diffrn_reflns_limit_h_max       28
_diffrn_reflns_limit_h_min       -28
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            6753
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         2.95
_exptl_absorpt_coefficient_mu    0.102
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.333
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prisms
_exptl_crystal_F_000             1352
_exptl_crystal_size_max          0.33
_exptl_crystal_size_mid          0.27
_exptl_crystal_size_min          0.20
_refine_diff_density_max         1.002
_refine_diff_density_min         -0.549
_refine_diff_density_rms         0.064
_refine_ls_extinction_coef       0.0035(13)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   2.878
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     218
_refine_ls_number_reflns         3599
_refine_ls_number_restraints     12
_refine_ls_restrained_S_all      2.879
_refine_ls_R_factor_all          0.1616
_refine_ls_R_factor_gt           0.0964
_refine_ls_shift/su_max          0.343
_refine_ls_shift/su_mean         0.023
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0330P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2159
_refine_ls_wR_factor_ref         0.2271
_reflns_number_gt                1973
_reflns_number_total             3599
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol061391asi20060620_035539.cif
_cod_data_source_block           ap211
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      C2/c
_cod_original_formula_sum        'C15 H21 N2 O5.50'
_cod_database_code               1506140