7-endo selenocyclization reactions on chiral 3-prenyl and 3-cinnamyl-2-hydroxymethylperhydro-1,3-benzoxazine derivatives. A way to enantiopure 1,4-oxazepanes.
Nieto, Javier; Andrés, Celia; Pérez-Encabo, Alfonso; Organic & biomolecular chemistry 13 (2015) 9118–9126; doi:10.1039/c5ob01297j

data_7154602
_publ_section_title
;
 7-endo selenocyclization reactions on chiral 3-prenyl and
 3-cinnamyl-2-hydroxymethylperhydro-1,3-benzoxazine derivatives. A way to
 enantiopure 1,4-oxazepanes.
;
_journal_issue                   34
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              9118
_journal_page_last               9126
_journal_paper_doi               10.1039/c5ob01297j
_journal_volume                  13
_journal_year                    2015
_chemical_absolute_configuration rmad
_chemical_formula_sum            'C28 H37 N O2 Se'
_chemical_formula_weight         498.55
_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
_audit_update_record
;
2015-06-12 deposited with the CCDC.
2015-07-17 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.5898(17)
_cell_length_b                   10.768(2)
_cell_length_c                   28.159(6)
_cell_measurement_temperature    298(2)
_cell_volume                     2604.6(9)
_computing_cell_refinement       'Bruker XSCANS'
_computing_data_collection       'Bruker XSCANS'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker P4'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0257
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            3759
_diffrn_reflns_theta_full        23.28
_diffrn_reflns_theta_max         23.28
_diffrn_reflns_theta_min         1.45
_exptl_absorpt_coefficient_mu    1.465
_exptl_absorpt_correction_T_max  1.000000
_exptl_absorpt_correction_T_min  0.797109
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
 G.M. Sheldrick. 
 SADABS: A program for absorption correction with the Siemens SMART system;  University of G\"ottingen, Germany, 1996. 
;
_exptl_crystal_colour            COLORLESS
_exptl_crystal_density_diffrn    1.271
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1048
_exptl_crystal_size_max          0.43
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.09
_refine_diff_density_max         0.853
_refine_diff_density_min         -0.296
_refine_diff_density_rms         0.062
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.016(12)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.080
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     293
_refine_ls_number_reflns         3759
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.080
_refine_ls_R_factor_all          0.0440
_refine_ls_R_factor_gt           0.0394
_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^)+(0.0679P)^2^+1.2034P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1064
_refine_ls_wR_factor_ref         0.1096
_reflns_number_gt                3488
_reflns_number_total             3759
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c5ob01297j2.cif
_cod_data_source_block           pil02a
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 3271 2015-04-21 07:52:19Z andrius 

 Adding full bibliography for 7154600--7154605.cif.
;
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               7154602