Organocatalytic Asymmetric Robinson Annulation of α,β-Unsaturated Aldehydes: Applications to the Total Synthesis of (+)-Palitantin
Bor-Cherng Hong; Ming-Fun Wu; Hsing-Chang Tseng; Guo-Fong Huang; Cheng-Feng Su; Ju-Hsiou Liao; Journal of Organic Chemistry 72 (2007) 8459–8471; doi:10.1021/jo701477v

data_4023023
_publ_section_title
;
 Organocatalytic Asymmetric Robinson Annulation of
 \a,\b-Unsaturated Aldehydes: Applications to the Total Synthesis of
 (+)-Palitantin
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              8459
_journal_page_last               8471
_journal_paper_doi               10.1021/jo701477v
_journal_volume                  72
_journal_year                    2007
_chemical_formula_sum            'C14 H13 N O3'
_chemical_formula_weight         243.25
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_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            8
_cell_length_a                   8.4574(13)
_cell_length_b                   15.167(2)
_cell_length_c                   19.340(3)
_cell_measurement_reflns_used    328
_cell_measurement_temperature    294(2)
_cell_measurement_theta_max      23.529
_cell_measurement_theta_min      -23.529
_cell_volume                     2480.8(6)
_computing_cell_refinement       'BRUKER SMART'
_computing_data_collection       'BRUKER SMART'
_computing_data_reduction        'BRUKER SAINT'
_computing_molecular_graphics    Ortep-3
_computing_publication_material  'Wingx publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      294(2)
_diffrn_measured_fraction_theta_full 0.983
_diffrn_measured_fraction_theta_max 0.983
_diffrn_measurement_device_type  'Bruker Smart Apex'
_diffrn_measurement_method       'phi-omega scan'
_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  0.1785
_diffrn_reflns_av_sigmaI/netI    0.1381
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            20391
_diffrn_reflns_theta_full        28.27
_diffrn_reflns_theta_max         28.27
_diffrn_reflns_theta_min         2.11
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.092
_exptl_absorpt_correction_T_max  0.9954
_exptl_absorpt_correction_T_min  0.9890
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            brown
_exptl_crystal_density_diffrn    1.303
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rod
_exptl_crystal_F_000             1024
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.09
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.235
_refine_diff_density_min         -0.230
_refine_diff_density_rms         0.057
_refine_ls_extinction_coef       0.0087(18)
_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   1.056
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     165
_refine_ls_number_reflns         3026
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.056
_refine_ls_R_factor_all          0.2428
_refine_ls_R_factor_gt           0.1066
_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^)+(0.0843P)^2^+0.0525P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1846
_refine_ls_wR_factor_ref         0.2313
_reflns_number_gt                1251
_reflns_number_total             3026
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo701477v-File003.cif
_cod_data_source_block           lab524gn
_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.

'_exptl_absorpt_correction_type' value 'Empirical' changed to
'empirical' 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_database_code               4023023