Phosphine- and nitrogen-containing Lewis base catalyzed highly regioselective and geometric selective cyclization of isatin derived electron-deficient alkenes with ethyl 2,3-butadienoate.
Zhang, Xiu-Chun; Cao, Shu-Hua; Wei, Yin; Shi, Min; Organic letters 13 (2011) 1142–1145; doi:10.1021/ol1031798

data_1501983
_publ_section_title
;
 Phosphine- and nitrogen-containing Lewis base catalyzed highly
 regioselective and geometric selective cyclization of isatin derived
 electron-deficient alkenes with ethyl 2,3-butadienoate.
;
_journal_issue                   5
_journal_name_full               'Organic letters'
_journal_page_first              1142
_journal_page_last               1145
_journal_paper_doi               10.1021/ol1031798
_journal_volume                  13
_journal_year                    2011
_chemical_formula_sum            'C28 H29 N O7'
_chemical_formula_weight         491.52
_space_group_IT_number           2
_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
_cell_angle_alpha                111.421(5)
_cell_angle_beta                 93.474(6)
_cell_angle_gamma                109.002(6)
_cell_formula_units_Z            2
_cell_length_a                   8.912(3)
_cell_length_b                   11.563(4)
_cell_length_c                   14.488(5)
_cell_measurement_reflns_used    3425
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      56.301
_cell_measurement_theta_min      4.938
_cell_volume                     1286.5(8)
_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 0.983
_diffrn_measured_fraction_theta_max 0.983
_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  0.0229
_diffrn_reflns_av_sigmaI/netI    0.0263
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            7047
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         1.99
_exptl_absorpt_coefficient_mu    0.091
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.25592
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.269
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             520
_exptl_crystal_size_max          0.297
_exptl_crystal_size_mid          0.286
_exptl_crystal_size_min          0.101
_refine_diff_density_max         0.374
_refine_diff_density_min         -0.275
_refine_diff_density_rms         0.051
_refine_ls_extinction_coef       0.037(5)
_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   1.070
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     348
_refine_ls_number_reflns         4963
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.070
_refine_ls_R_factor_all          0.0718
_refine_ls_R_factor_gt           0.0616
_refine_ls_shift/su_max          0.047
_refine_ls_shift/su_mean         0.007
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1095P)^2^+0.2040P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1775
_refine_ls_wR_factor_ref         0.1883
_reflns_number_gt                3935
_reflns_number_total             4963
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol1031798_si_002.cif
_cod_data_source_block           cd201570
_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_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        1286.4(7)
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               1501983