The cascade radical cyclisation approach to prenylated alkaloids: synthesis of stephacidin A and notoamide B.
Simpkins, Nigel S.; Pavlakos, Ilias; Weller, Michael D.; Male, Louise; Organic & biomolecular chemistry 11 (2013) 4957–4970; doi:10.1039/c3ob40979a

data_7153033
_publ_section_title
;
 The cascade radical cyclisation approach to prenylated alkaloids:
 synthesis of stephacidin A and notoamide B.
;
_journal_issue                   30
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              4957
_journal_page_last               4970
_journal_paper_doi               10.1039/c3ob40979a
_journal_volume                  11
_journal_year                    2013
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C21 H25 N3 O2'
_chemical_formula_sum            'C21 H25 N3 O2'
_chemical_formula_weight         351.44
_chemical_name_systematic
;
?
;
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_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_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.25880(10)
_cell_length_b                   11.7630(2)
_cell_length_c                   12.8358(2)
_cell_measurement_reflns_used    8004
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      70.558
_cell_measurement_theta_min      3.444
_cell_volume                     1699.94(4)
_computing_cell_refinement       'SAINT V6.28A (Bruker, 1997)'
_computing_data_collection       'SMART V5.626 (Bruker, 1997)'
_computing_data_reduction        'SAINT V6.28A (Bruker, 1997)'
_computing_molecular_graphics
;
OLEX2 (Dolomanov, O.V., Bourhis, L.J., Gildea, R.J., Howard, J.A.K,
& Puschmann, H., 2009)
;
_computing_publication_material  'WinGX (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      120(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Bruker SMART 6000'
_diffrn_measurement_method       'Omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
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_diffrn_reflns_av_R_equivalents  0.0278
_diffrn_reflns_av_sigmaI/netI    0.0241
_diffrn_reflns_limit_h_max       13
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_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            10076
_diffrn_reflns_theta_full        66.57
_diffrn_reflns_theta_max         66.57
_diffrn_reflns_theta_min         6.44
_exptl_absorpt_coefficient_mu    0.713
_exptl_absorpt_correction_T_max  0.9321
_exptl_absorpt_correction_T_min  0.8705
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2.07 (Sheldrick, G.M., 2007)'
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.373
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             752
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.362
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_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.1(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.068
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     237
_refine_ls_number_reflns         2910
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.068
_refine_ls_R_factor_all          0.0344
_refine_ls_R_factor_gt           0.0329
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0537P)^2^+0.3250P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0849
_refine_ls_wR_factor_ref         0.0861
_reflns_number_gt                2805
_reflns_number_total             2910
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            c3ob40979a.txt
_cod_data_source_block           Ip-683-2
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.2 from
2011-04-26.

'_exptl_absorpt_correction_type' value 'Multi-scan'
changed to 'multi-scan' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_database_code               7153033