Total Synthesis of 20-Norsalvinorin A. 1. Preparation of a Key Intermediate
Ylva E. Bergman; Roger Mulder; Patrick Perlmutter; Journal of Organic Chemistry 74 (2009) 2589–2591; doi:10.1021/jo802623n

data_4024397
_publ_section_title
;
Total Synthesis of 20-Norsalvinorin A. 1. Preparation of a Key Intermediate
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              2589
_journal_page_last               2591
_journal_paper_doi               10.1021/jo802623n
_journal_volume                  74
_journal_year                    2009
_chemical_formula_moiety         'C21 H24 O4'
_chemical_formula_sum            'C21 H24 O4'
_chemical_formula_weight         340.40
_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                 98.2800(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   16.8730(6)
_cell_length_b                   10.3219(3)
_cell_length_c                   9.8594(3)
_cell_measurement_temperature    123(2)
_cell_volume                     1699.23(9)
_computing_cell_refinement       'Bruker Apex2 v2.0 (Bruker AXS, 2005)'
_computing_data_collection       'Bruker Apex2 v2.0 (Bruker AXS, 2005)'
_computing_data_reduction        'Bruker Apex2 v2.0 (Bruker AXS, 2005)'
_computing_molecular_graphics    'X-Seed (Barbour, 2001)'
_computing_publication_material  'CIFTAB (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      123(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Bruker X8 Apex CCD'
_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  0.0312
_diffrn_reflns_av_sigmaI/netI    0.0366
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            15576
_diffrn_reflns_theta_full        30.00
_diffrn_reflns_theta_max         30.00
_diffrn_reflns_theta_min         2.32
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.091
_exptl_absorpt_correction_T_max  0.99
_exptl_absorpt_correction_T_min  0.97
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1997)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.331
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             728
_exptl_crystal_size_max          0.13
_exptl_crystal_size_mid          0.13
_exptl_crystal_size_min          0.13
_refine_diff_density_max         0.435
_refine_diff_density_min         -0.238
_refine_diff_density_rms         0.053
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.207
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     322
_refine_ls_number_reflns         4930
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.207
_refine_ls_R_factor_all          0.0678
_refine_ls_R_factor_gt           0.0609
_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^)+(0.0360P)^2^+1.0034P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1236
_refine_ls_wR_factor_ref         0.1268
_reflns_number_gt                4500
_reflns_number_total             4930
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo802623n_si_002.cif
_cod_data_source_block           a46_07a
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4024397