Stereoselective synthesis of Baylis-Hillman-type adducts via allenolates generated by acyl migration.
Gudimalla, Nagaraju; Fröhlich, Roland; Hoppe, Dieter; Organic letters 6 (2004) 4005–4008; doi:10.1021/ol0483908

data_1506992
_publ_section_title
;
 Stereoselective synthesis of Baylis-Hillman-type adducts via allenolates
 generated by acyl migration.
;
_journal_issue                   22
_journal_name_full               'Organic letters'
_journal_page_first              4005
_journal_page_last               4008
_journal_paper_doi               10.1021/ol0483908
_journal_volume                  6
_journal_year                    2004
_chemical_formula_sum            'C28 H39 N O4'
_chemical_formula_weight         453.60
_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                   8.660(1)
_cell_length_b                   13.115(1)
_cell_length_c                   23.230(1)
_cell_measurement_temperature    223(2)
_cell_volume                     2638.4(4)
_computing_cell_refinement       'Collect (Nonius B.V., 1998)'
_computing_data_collection       'Collect (Nonius B.V., 1998)'
_computing_data_reduction        'Denzo-SMN (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'Diamond (Brandenburg, 1997)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      223(2)
_diffrn_measured_fraction_theta_full 0.958
_diffrn_measured_fraction_theta_max 0.958
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.026
_diffrn_reflns_av_sigmaI/netI    0.0354
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            10241
_diffrn_reflns_theta_full        65.03
_diffrn_reflns_theta_max         65.03
_diffrn_reflns_theta_min         3.81
_exptl_absorpt_coefficient_mu    0.596
_exptl_absorpt_correction_T_max  0.8901
_exptl_absorpt_correction_T_min  0.7965
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'SORTAV (Blessing, 1995 & 1997)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.142
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             984
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.403
_refine_diff_density_min         -0.257
_refine_diff_density_rms         0.040
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.0(4)
_refine_ls_extinction_coef       0.0023(4)
_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   1.048
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     309
_refine_ls_number_reflns         4027
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.048
_refine_ls_R_factor_all          0.0714
_refine_ls_R_factor_gt           0.0564
_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^)+(0.0644P)^2^+1.5485P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1411
_refine_ls_wR_factor_ref         0.1524
_reflns_number_gt                3280
_reflns_number_total             4027
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol0483908si20040813_045932.cif
_cod_data_source_block           hop2438
_cod_original_sg_symbol_H-M      P212121
_cod_database_code               1506992