Biomimetically relevant self-condensations of C5 units derived from lysine.
Salame, Rim; Gravel, Edmond; Retailleau, Pascal; Poupon, Erwan; Organic & biomolecular chemistry 8 (2010) 2522–2528; doi:10.1039/b926786g

data_7153322
_publ_section_title
;
 Biomimetically relevant self-condensations of C5 units derived from
 lysine.
;
_journal_issue                   11
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              2522
_journal_page_last               2528
_journal_paper_doi               10.1039/b926786g
_journal_volume                  8
_journal_year                    2010
_chemical_formula_moiety         'C10 H12 O3'
_chemical_formula_sum            'C10 H12 O3'
_chemical_formula_weight         180.20
_chemical_name_common
2-oxo-3,4,4a,7,8,8a-hexahydro-2H-chromene-6-carbaldehyde
_chemical_name_systematic
;
2-oxo-3,4,4a,7,8,8a-hexahydro-2H-chromene-6-carbaldehyde
;
_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   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 96.38(5)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.6270(10)
_cell_length_b                   13.282(3)
_cell_length_c                   10.388(2)
_cell_measurement_reflns_used    1727
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25.35
_cell_measurement_theta_min      0.41
_cell_volume                     908.7(3)
_computing_cell_refinement
'DENZO (Otwinowski & Minor, 1997); COLLECT (Nonius B.V., 1999)'
_computing_data_collection
'DENZO (Otwinowski & Minor, 1997); COLLECT (Nonius B.V., 1999)'
_computing_data_reduction        'SCALEPACK (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'PLATON (Spek, 2003)'
_computing_publication_material  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_refinement
'SHELXL97 (Sheldrick, 2008); CRYSTALBUILDER (Welter, 2006)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type  'Nonius kappa-CCD diffractometer'
_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     0.71070
_diffrn_reflns_av_R_equivalents  0.0189
_diffrn_reflns_av_sigmaI/netI    0.0263
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            13337
_diffrn_reflns_theta_full        25.35
_diffrn_reflns_theta_max         25.35
_diffrn_reflns_theta_min         3.09
_exptl_absorpt_coefficient_mu    0.097
_exptl_absorpt_correction_T_max  0.967
_exptl_absorpt_correction_T_min  0.892
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Scalepack (Otwinowski & Minor, 1997)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.317
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             384
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.47
_exptl_crystal_size_min          0.35
_refine_diff_density_max         0.332
_refine_diff_density_min         -0.322
_refine_diff_density_rms         0.130
_refine_ls_extinction_coef       0.20(4)
_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   1.077
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     119
_refine_ls_number_reflns         1646
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.077
_refine_ls_R_factor_all          0.0955
_refine_ls_R_factor_gt           0.0731
_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^)+(0.1220P)^2^+0.1931P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1952
_refine_ls_wR_factor_ref         0.2177
_reflns_number_gt                1166
_reflns_number_total             1646
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b926786g.txt
_cod_data_source_block           compound_8_CCDC_753047
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               7153322