A Convergent and Stereocontrolled Cycloaddition Strategy toward Eudesmane Sesquiterpenoid: Total Synthesis of (\±)-6β,14-Epoxyeudesm-4(15)-en-1β-ol
Cui-Cui Wang; Wei-Dong Z. Li; Journal of Organic Chemistry 77 (2012) 4217–4225; doi:10.1021/jo300556r

data_4027185
_publ_section_title
;
 A Convergent and Stereocontrolled Cycloaddition Strategy toward Eudesmane
 Sesquiterpenoid: Total Synthesis of
 (\+-)-6\b,14-Epoxyeudesm-4(15)-en-1\b-ol
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              4217
_journal_page_last               4225
_journal_paper_doi               10.1021/jo300556r
_journal_volume                  77
_journal_year                    2012
_chemical_formula_sum            'C22 H29 N O3'
_chemical_formula_weight         355.46
_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                 98.5760(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.0388(3)
_cell_length_b                   18.6942(5)
_cell_length_c                   10.7459(3)
_cell_measurement_reflns_used    3145
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      23.12
_cell_measurement_theta_min      2.81
_cell_volume                     1994.11(10)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w 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  0.0244
_diffrn_reflns_av_sigmaI/netI    0.0260
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            11078
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         2.05
_exptl_absorpt_coefficient_mu    0.078
_exptl_absorpt_correction_T_max  0.9703
_exptl_absorpt_correction_T_min  0.9673
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.184
_exptl_crystal_description       block
_exptl_crystal_F_000             768
_exptl_crystal_size_max          0.43
_exptl_crystal_size_mid          0.42
_exptl_crystal_size_min          0.39
_refine_diff_density_max         0.174
_refine_diff_density_min         -0.128
_refine_diff_density_rms         0.027
_refine_ls_extinction_coef       0.0060(9)
_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   1.040
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     239
_refine_ls_number_reflns         3912
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.040
_refine_ls_R_factor_all          0.0596
_refine_ls_R_factor_gt           0.0388
_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^)+(0.0471P)^2^+0.2194P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0960
_refine_ls_wR_factor_ref         0.1073
_reflns_number_gt                2755
_reflns_number_total             3912
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo300556r_si_002.cif
_cod_data_source_block           p21c
_cod_database_code               4027185