α-Chloronitroso compounds derived from carbohydrate ketones: cycloadditions with cyclic dienes, a synthesis of (−)-physoperuvine and a formal synthesis of (+)-epibatidine
Hall, Adrian; Bailey, Patrick D.; Rees, David C.; Rosair, Georgina M.; Wightman, Richard H.; Journal of the Chemical Society, Perkin Transactions 1  (2000) 329–; doi:10.1039/a908333b

data_7203932
_publ_section_title
;
 \a-Chloronitroso compounds derived from carbohydrate ketones:
 cycloadditions with cyclic dienes, a synthesis of
 (&#x2212;)-physoperuvine and a formal synthesis of (+)-epibatidine
;
_journal_issue                   3
_journal_name_full
'Journal of the Chemical Society, Perkin Transactions 1'
_journal_page_first              329
_journal_paper_doi               10.1039/a908333b
_journal_year                    2000
_chemical_formula_sum            'C24 H30 Cl N O5 Si'
_chemical_formula_weight         476.03
_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                   9.9200(10)
_cell_length_b                   10.1030(10)
_cell_length_c                   25.963(2)
_cell_measurement_reflns_used    27
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      10.88
_cell_measurement_theta_min      4.59
_cell_volume                     2602.1(4)
_computing_cell_refinement       'Siemens XSCANS'
_computing_data_collection       'Siemens XSCANS'
_computing_data_reduction        'Siemens SHELXTL'
_computing_molecular_graphics    'Siemens SHELXTL'
_computing_publication_material  'Siemens SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type  'Siemens 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  0.0313
_diffrn_reflns_av_sigmaI/netI    0.0966
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -1
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -1
_diffrn_reflns_limit_l_max       30
_diffrn_reflns_limit_l_min       -1
_diffrn_reflns_number            3349
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.16
_diffrn_standards_decay_%        7.01
_diffrn_standards_interval_count 97
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.225
_exptl_absorpt_correction_T_max  0.7809
_exptl_absorpt_correction_T_min  0.7600
_exptl_absorpt_correction_type   empirical
_exptl_crystal_colour            royal_blue
_exptl_crystal_density_diffrn    1.215
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rectangular_block
_exptl_crystal_F_000             1008
_exptl_crystal_size_max          0.5
_exptl_crystal_size_mid          0.3
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.199
_refine_diff_density_min         -0.178
_refine_diff_density_rms         0.045
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.2(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.011
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     290
_refine_ls_number_reflns         3143
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.011
_refine_ls_R_factor_all          0.1265
_refine_ls_R_factor_gt           0.0582
_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^)+(0.0284P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0972
_refine_ls_wR_factor_ref         0.1201
_reflns_number_gt                1765
_reflns_number_total             3143
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            a908333b.txt
_cod_data_source_block           17
_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 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               7203932