Tandem Double-Intramolecular [4+2]/[3+2] Cycloadditions of Nitroalkenes. Studies toward a Total Synthesis of Daphnilactone B: Piperidine Ring Construction
Scott E. Denmark; Ramil Y. Baiazitov; Journal of Organic Chemistry 71 (2006) 593–605; doi:10.1021/jo052001l

data_4021394
_publ_contact_author
; 
Scott R. Wilson 
University of Illinois 
School of Chemical Sciences, Box 59-1 
505 South Mathews Avenue 
Urbana, Illinois  61801 
USA 
;
_publ_contact_author_email       srwilson@uiuc.edu
_publ_contact_author_fax         '1  217 244 8068'
_publ_contact_author_phone       '1  217 244 1708'
_publ_section_title
;
 Tandem Double-Intramolecular [4+2]/[3+2] Cycloadditions of
 Nitroalkenes. Studies toward a Total Synthesis of
 Daphnilactone B: Piperidine Ring Construction
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              593
_journal_page_last               605
_journal_paper_doi               10.1021/jo052001l
_journal_volume                  71
_journal_year                    2006
_chemical_formula_moiety         'C18 H27 N O4'
_chemical_formula_sum            'C18 H27 N O4'
_chemical_formula_weight         321.41
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
; 
2003-08-11   text and data added, ryb 
;
_cell_angle_alpha                102.783(14)
_cell_angle_beta                 92.301(14)
_cell_angle_gamma                97.012(14)
_cell_formula_units_Z            4
_cell_length_a                   9.906(7)
_cell_length_b                   13.089(9)
_cell_length_c                   13.690(9)
_cell_measurement_reflns_used    865
_cell_measurement_temperature    193(2)
_cell_measurement_theta_max      21.2
_cell_measurement_theta_min      2.7
_cell_volume                     1714(2)
_computing_cell_refinement       'SAINT V6.22 (Bruker, 2001)'
_computing_data_collection       'SMART V5.625 (Bruker, 2001)'
_computing_data_reduction        'SAINT V6.22 (Bruker, 2001)'
_computing_molecular_graphics    'SHELXTL V6.10 (Bruker, 2001)'
_computing_publication_material  'CIFTAB (Sheldrick, 2001)'
_computing_structure_refinement  'SHELXTL V6.10 (Bruker, 2001)'
_computing_structure_solution    'SHELXTL V6.10 (Bruker, 2001)'
_diffrn_ambient_temperature      193(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device       'Siemens Platform/CCD'
_diffrn_measurement_method       'profile data from \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'normal-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_radiation_wavelength_id  p66xmas
_diffrn_reflns_av_R_equivalents  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0869
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            14243
_diffrn_reflns_theta_full        25.31
_diffrn_reflns_theta_max         25.31
_diffrn_reflns_theta_min         2.45
_diffrn_standards_decay_%        8.8
_diffrn_standards_interval_time  610
_diffrn_standards_number         17
_exptl_absorpt_coefficient_mu    0.087
_exptl_absorpt_correction_T_max  0.9928
_exptl_absorpt_correction_T_min  0.9619
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details   '(Bruker, 2001)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.245
_exptl_crystal_density_meas      ?
_exptl_crystal_description       tabular
_exptl_crystal_F_000             696
_exptl_crystal_id                p66xmas
_exptl_crystal_preparation
; 
The data crystal was mounted using oil (Parantone-N, Exxon) to a 
0.3 mm cryo-loop (Hampton Research) with the (0 -1 0) scattering planes 
roughly normal to the spindle axis. 
;
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.32
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.206
_refine_diff_density_min         -0.206
_refine_diff_density_rms         0.054
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.921
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     422
_refine_ls_number_reflns         10944
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.921
_refine_ls_R_factor_all          0.1292
_refine_ls_R_factor_gt           0.0566
_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^)+(0.0851P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1314
_refine_ls_wR_factor_ref         0.1570
_reflns_number_gt                5705
_reflns_number_total             10944
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo052001lsi20051111_124908.cif
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
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_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_Hall     '-P 1 '
_cod_database_code               4021394