Approaches to the quaternary stereocentre and to the heterocyclic core in diazonamide A using the Heck reaction and related coupling reactions
Booker, James E. M.; Boto, Alicia; Churchill, Gwydion H.; Green, Clive P.; Ling, Matthew; Meek, Graham; Prabhakaran, Jaya; Sinclair, David; Blake, Alexander J.; Pattenden, Gerald; Organic & Biomolecular Chemistry 4 (2006) 4193–; doi:10.1039/b609604b

data_7151301
_publ_section_title
;
 Approaches to the quaternary stereocentre and to the heterocyclic core
 in diazonamide A using the Heck reaction and related coupling
 reactions
;
_journal_issue                   22
_journal_name_full               'Organic &amp;  Biomolecular Chemistry'
_journal_page_first              4193
_journal_paper_doi               10.1039/b609604b
_journal_volume                  4
_journal_year                    2006
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C27 H31 N O5'
_chemical_formula_sum            'C27 H31 N O5'
_chemical_formula_weight         449.53
_chemical_name_systematic
;
2,2-dimethyl-4-(S)-spiro[4H-1-benzopyran-4R,4'-(3'H)-[1H-2]
benzopyran-3(S)-yl]oxazolidinine-3-carboxylic acod tert butyl carbamate
;
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL97
_cell_angle_alpha                90.00
_cell_angle_beta                 100.138(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   9.4857(10)
_cell_length_b                   9.8441(10)
_cell_length_c                   13.0354(14)
_cell_measurement_reflns_used    2144
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      25.2
_cell_measurement_theta_min      2.6
_cell_volume                     1198.2(2)
_computing_cell_refinement       'Bruker SAINT version 6.02a (Bruker, 2000)'
_computing_data_collection       'Bruker SMART version 5.624 (Bruker, 2001)'
_computing_data_reduction        'Bruker SAINT; Bruker SHELXTL (Bruker, 1997)'
_computing_publication_material  'SHELXL-97; PLATON (Spek, 2001)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.983
_diffrn_measured_fraction_theta_max 0.901
_diffrn_measurement_device_type  'Bruker SMART1000 CCD area detector'
_diffrn_measurement_method       omega
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.033
_diffrn_reflns_av_sigmaI/netI    0.0531
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            7124
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         28.81
_diffrn_reflns_theta_min         2.18
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.085
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.246
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             480
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.19
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.177
_refine_diff_density_min         -0.151
_refine_diff_density_rms         0.035
_refine_ls_extinction_coef       0.0028(14)
_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   0.928
_refine_ls_hydrogen_treatment    'riding model'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     299
_refine_ls_number_reflns         2974
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.927
_refine_ls_R_factor_all          0.0574
_refine_ls_R_factor_gt           0.0376
_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^)+(0.0336P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0678
_refine_ls_wR_factor_ref         0.0739
_reflns_number_gt                2238
_reflns_number_total             2980
_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            b609604b.txt
_cod_data_source_block           hxoxaz
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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 

The following automatic conversions were performed:

'_atom_sites_solution_hydrogens' value 'geometrically placed' was
changed to 'geom'.

Automatic conversion script
Id: cif_fix_values 6452 2018-10-05 10:23:21Z andrius 
;
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               7151301