Asymmetric [3+2] annulation of allenes with maleimides catalyzed by dipeptide-derived phosphines: facile creation of functionalized bicyclic cyclopentenes containing two tertiary stereogenic centers
Qianyi Zhao; Xiaoyu Han; Yin Wei; Min Shi; Yixin Lu; Chem.Commun. 48 (2012) 970–; doi:10.1039/c2cc16904e

data_7107212
_publ_section_title
;
 Asymmetric [3+2] annulation of allenes with maleimides catalyzed by
 dipeptide-derived phosphines: facile creation of functionalized bicyclic
 cyclopentenes containing two tertiary stereogenic centers
;
_journal_name_full               Chem.Commun.
_journal_page_first              970
_journal_paper_doi               10.1039/c2cc16904e
_journal_volume                  48
_journal_year                    2012
_chemical_formula_sum            'C21 H25 Br N2 O3'
_chemical_formula_weight         433.34
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_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                 98.968(17)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   8.960(7)
_cell_length_b                   21.905(17)
_cell_length_c                   20.488(16)
_cell_measurement_reflns_used    2095
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      43.149
_cell_measurement_theta_min      4.960
_cell_volume                     3972(5)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_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      293(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0488
_diffrn_reflns_av_sigmaI/netI    0.0789
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -26
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            16455
_diffrn_reflns_theta_full        25.50
_diffrn_reflns_theta_max         25.50
_diffrn_reflns_theta_min         1.86
_exptl_absorpt_coefficient_mu    2.093
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.2635
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.449
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             1792
_exptl_crystal_size_max          0.265
_exptl_crystal_size_mid          0.071
_exptl_crystal_size_min          0.063
_refine_diff_density_max         0.673
_refine_diff_density_min         -0.644
_refine_diff_density_rms         0.069
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.010
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     495
_refine_ls_number_reflns         7349
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.010
_refine_ls_R_factor_all          0.1320
_refine_ls_R_factor_gt           0.0646
_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^)+(0.0899P)^2^+0.6925P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1571
_refine_ls_wR_factor_ref         0.1916
_reflns_number_gt                3819
_reflns_number_total             7349
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2cc16904e.txt
_cod_data_source_block           cd211381
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7107212