Total synthesis of (+/-)-pallambins C and D
Xue-Song Xu; Zhen-Wu Li; Yi-Jun Zhang; Xiao-Shui Peng; Henry N. C. Wong; Chem.Commun. 48 (2012) 8517–; doi:10.1039/c2cc34310j

data_7108188
_publ_section_title
;
 Total synthesis of (+/-)-pallambins C and D
;
_journal_name_full               Chem.Commun.
_journal_page_first              8517
_journal_paper_doi               10.1039/c2cc34310j
_journal_volume                  48
_journal_year                    2012
_chemical_formula_sum            'C18 H30 O5'
_chemical_formula_weight         326.42
_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                93.330(6)
_cell_angle_beta                 106.838(6)
_cell_angle_gamma                101.942(6)
_cell_formula_units_Z            2
_cell_length_a                   8.331(2)
_cell_length_b                   8.783(2)
_cell_length_c                   13.724(4)
_cell_measurement_temperature    296(2)
_cell_volume                     932.8(4)
_computing_cell_refinement       SAINT(Bruker,2001)
_computing_data_collection       APEX2(Bruker,2003)
_computing_data_reduction        APEX2(Bruker,2003)
_computing_molecular_graphics    DIAMOND
_computing_publication_material  'SHELXL-97 (Sheldrick, 2008)'
_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 diffractometer'
_diffrn_measurement_method       '\f and \w 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  0.0879
_diffrn_reflns_av_sigmaI/netI    0.0521
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            21479
_diffrn_reflns_theta_full        25.25
_diffrn_reflns_theta_max         25.25
_diffrn_reflns_theta_min         1.56
_exptl_absorpt_coefficient_mu    0.083
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.162
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             356
_exptl_crystal_size_max          0.4
_exptl_crystal_size_mid          0.3
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.358
_refine_diff_density_min         -0.358
_refine_diff_density_rms         0.044
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.019
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     208
_refine_ls_number_reflns         3356
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.019
_refine_ls_R_factor_all          0.0990
_refine_ls_R_factor_gt           0.0585
_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^)+(0.0709P)^2^+0.4285P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1441
_refine_ls_wR_factor_ref         0.1732
_reflns_number_gt                2131
_reflns_number_total             3356
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2cc34310j.txt
_cod_data_source_block           a2
_cod_original_cell_volume        932.9(4)
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7108188