Synthesis of fully substituted polyhydroxylated pyrrolizidines via Cope-House cyclization.
Zhang, Wei; Sato, Kasumi; Kato, Atsushi; Jia, Yue-Mei; Hu, Xiang-Guo; Wilson, Francis X.; van Well, Renate; Horne, Graeme; Fleet, George W. J.; Nash, Robert J.; Yu, Chu-Yi; Organic letters 13 (2011) 4414–4417; doi:10.1021/ol201749c

data_1502383
_publ_section_title
;
 Synthesis of fully substituted polyhydroxylated pyrrolizidines via
 Cope-House cyclization.
;
_journal_issue                   16
_journal_name_full               'Organic letters'
_journal_page_first              4414
_journal_page_last               4417
_journal_paper_doi               10.1021/ol201749c
_journal_volume                  13
_journal_year                    2011
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C33 H39 N O4 S2'
_chemical_formula_sum            'C33 H39 N O4 S2'
_chemical_formula_weight         577.77
_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                   10.1866(15)
_cell_length_b                   13.017(2)
_cell_length_c                   22.877(4)
_cell_measurement_reflns_used    598
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      2.17
_cell_volume                     3033.5(8)
_computing_cell_refinement       'CrystalClear (Rigaku Inc., 200)'
_computing_data_collection       'CrystalClear (Rigaku Inc., 2007)'
_computing_data_reduction        'CrystalClear (Rigaku Inc., 2007)'
_computing_molecular_graphics    'XP in Siemens SHELXTL (Sheldrick, 1994)'
_computing_publication_material  'SHELX97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'MM007-HF CCD(Saturn 724+)'
_diffrn_measurement_method       '\w scans at fixed \c = 45\%'
_diffrn_radiation_monochromator  Confocal
_diffrn_radiation_source         'rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0597
_diffrn_reflns_av_sigmaI/netI    0.0564
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -29
_diffrn_reflns_number            25235
_diffrn_reflns_theta_full        27.47
_diffrn_reflns_theta_max         27.47
_diffrn_reflns_theta_min         1.78
_exptl_absorpt_coefficient_mu    0.213
_exptl_absorpt_correction_T_max  0.9790
_exptl_absorpt_correction_T_min  0.9486
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   'CrystalClear (Rigaku Inc., 2007)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.265
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             1232
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.542
_refine_diff_density_min         -0.233
_refine_diff_density_rms         0.051
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.04(8)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.095
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     362
_refine_ls_number_reflns         6935
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.095
_refine_ls_R_factor_all          0.0646
_refine_ls_R_factor_gt           0.0592
_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^)+(0.0404P)^2^+1.5542P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1218
_refine_ls_wR_factor_ref         0.1249
_reflns_number_gt                6433
_reflns_number_total             6935
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol201749c_si_002.cif
_cod_data_source_block           mx477
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               1502383