Total Synthesis of Cytotoxic Macrolide Amphidinolide B1and the Proposed Structure of Amphidinolide B2
Liang Lu; Wei Zhang; Rich G. Carter; Journal of the American Chemical Society 130 (2008) 7253–7255; doi:10.1021/ja803012n

data_4107894
_publ_section_title
;
 Total Synthesis of Cytotoxic Macrolide Amphidinolide B1and the Proposed
 Structure of Amphidinolide B2
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              7253
_journal_page_last               7255
_journal_paper_doi               10.1021/ja803012n
_journal_volume                  130
_journal_year                    2008
_chemical_formula_sum            'C19 H25 N O3 S'
_chemical_formula_weight         347.46
_chemical_name_systematic
; 
 ? 
;
_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           SHELXLTL
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.3648(10)
_cell_length_b                   10.0518(11)
_cell_length_c                   18.751(2)
_cell_measurement_reflns_used    2316
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      18.89
_cell_measurement_theta_min      2.30
_cell_volume                     1765.1(3)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'CCD area detector'
_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  0.0595
_diffrn_reflns_av_sigmaI/netI    0.0495
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            19903
_diffrn_reflns_theta_full        26.99
_diffrn_reflns_theta_max         26.99
_diffrn_reflns_theta_min         2.17
_exptl_absorpt_coefficient_mu    0.200
_exptl_absorpt_correction_T_max  0.9940
_exptl_absorpt_correction_T_min  0.9573
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.307
_exptl_crystal_density_meas      0
_exptl_crystal_description       plate
_exptl_crystal_F_000             744
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.13
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.203
_refine_diff_density_min         -0.237
_refine_diff_density_rms         0.043
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.03(8)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.060
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     317
_refine_ls_number_reflns         3842
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.060
_refine_ls_R_factor_all          0.0618
_refine_ls_R_factor_gt           0.0436
_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^)+(0.0322P)^2^+0.2254P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0799
_refine_ls_wR_factor_ref         0.0876
_reflns_number_gt                3156
_reflns_number_total             3842
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja803012n-file006.cif
_cod_data_source_block           rc31
_cod_database_code               4107894