Stereoselective synthesis of 2,4,5-trisubstituted tetrahydropyrans using an intramolecular allylation strategy.
Jervis, Peter J.; Kariuki, Benson M.; Cox, Liam R.; Organic letters 8 (2006) 4649–4652; doi:10.1021/ol061957v

data_1506234
_publ_section_title
;
 Stereoselective synthesis of 2,4,5-trisubstituted tetrahydropyrans using
 an intramolecular allylation strategy.
;
_journal_issue                   20
_journal_name_full               'Organic letters'
_journal_page_first              4649
_journal_page_last               4652
_journal_paper_doi               10.1021/ol061957v
_journal_volume                  8
_journal_year                    2006
_chemical_formula_moiety         'C13 H16 O2'
_chemical_formula_sum            'C13 H16 O2'
_chemical_formula_weight         204.26
_space_group_IT_number           29
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2ac'
_symmetry_space_group_name_H-M   'P c a 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.2356(3)
_cell_length_b                   5.4389(2)
_cell_length_c                   19.1892(5)
_cell_measurement_reflns_used    1919
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      70.87
_cell_measurement_theta_min      4.61
_cell_volume                     1172.64(6)
_computing_cell_refinement       SAINTPLUS
_computing_data_collection       SMART
_computing_data_reduction        SAINTPLUS
_computing_structure_refinement  SHELXTL
_computing_structure_solution    SHELXTL
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.982
_diffrn_measured_fraction_theta_max 0.982
_diffrn_measurement_device_type  'Bruker Smart 6000 CCD'
_diffrn_measurement_method       'CCD slices'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0377
_diffrn_reflns_av_sigmaI/netI    0.0339
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            6916
_diffrn_reflns_theta_full        70.87
_diffrn_reflns_theta_max         70.87
_diffrn_reflns_theta_min         4.61
_exptl_absorpt_coefficient_mu    0.610
_exptl_absorpt_correction_T_max  0.8675
_exptl_absorpt_correction_T_min  0.8576
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   Sadabs
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.157
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             440
_exptl_crystal_size_max          0.26
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.24
_refine_diff_density_max         0.109
_refine_diff_density_min         -0.107
_refine_diff_density_rms         0.021
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.2(2)
_refine_ls_extinction_coef       0.0045(7)
_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   1.059
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     138
_refine_ls_number_reflns         2098
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.058
_refine_ls_R_factor_all          0.0339
_refine_ls_R_factor_gt           0.0312
_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^)+(0.0553P)^2^+0.0317P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0898
_refine_ls_wR_factor_ref         0.0927
_reflns_number_gt                1919
_reflns_number_total             2098
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol061957vsi20060808_024754.cif
_cod_data_source_block           pjj289
_cod_depositor_comments
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The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from
2010-06-29.

'_exptl_absorpt_correction_type' value 'Empirical'
changed to 'empirical' 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_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      Pca21
_cod_database_code               1506234