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_7154604
_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            'C22 H35 N O2'
_chemical_formula_weight         345.51
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_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                 100.402(7)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   6.517(3)
_cell_length_b                   12.303(5)
_cell_length_c                   12.943(5)
_cell_measurement_temperature    298(2)
_cell_volume                     1020.7(7)
_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 0.998
_diffrn_measured_fraction_theta_max 0.998
_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    0.0162
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            2926
_diffrn_reflns_theta_full        23.27
_diffrn_reflns_theta_max         23.27
_diffrn_reflns_theta_min         1.60
_exptl_absorpt_coefficient_mu    0.070
_exptl_absorpt_correction_T_max  1.000000
_exptl_absorpt_correction_T_min  0.928015
_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    1.124
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             380
_exptl_crystal_size_max          0.47
_exptl_crystal_size_mid          0.37
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.094
_refine_diff_density_min         -0.090
_refine_diff_density_rms         0.021
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.3(10)
_refine_ls_extinction_coef       0.036(4)
_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   1.044
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     236
_refine_ls_number_reflns         2926
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.044
_refine_ls_R_factor_all          0.0287
_refine_ls_R_factor_gt           0.0278
_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^)+(0.0445P)^2^+0.0795P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0728
_refine_ls_wR_factor_ref         0.0739
_reflns_number_gt                2852
_reflns_number_total             2926
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c5ob01297j2.cif
_cod_data_source_block           pilk
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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)
_cod_database_code               7154604