Gram scale synthesis of 7-methoxy-O-methylmukonal, clausine-O, clausine-K, clausine-H, 7-methoxymukonal, and methyl 2-hydroxy-7-methoxy-9H-carbazole-3-carboxylate
Ma, Dengke; Dai, Jianxin; Qiu, Youai; Fu, Chunling; Ma, Shengming; Organic Chemistry Frontiers 1 (2014) 782–; doi:10.1039/C4QO00163J

data_1553017
_publ_section_title
;
 Gram scale synthesis of 7-methoxy-O-methylmukonal, clausine-O,
 clausine-K, clausine-H, 7-methoxymukonal, and methyl
 2-hydroxy-7-methoxy-9H-carbazole-3-carboxylate
;
_journal_issue                   7
_journal_name_full               'Organic Chemistry Frontiers'
_journal_page_first              782
_journal_paper_doi               10.1039/C4QO00163J
_journal_volume                  1
_journal_year                    2014
_chemical_formula_moiety         'C19 H21 N O4'
_chemical_formula_sum            'C19 H21 N O4'
_chemical_formula_weight         327.37
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_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           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                   8.8435(4)
_cell_length_b                   13.8908(7)
_cell_length_c                   14.1790(6)
_cell_measurement_reflns_used    4435
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      67.3393
_cell_measurement_theta_min      3.1788
_cell_volume                     1741.80(14)
_computing_cell_refinement       'CrysAlis PRO (Agilent Technologies, 2011)'
_computing_data_collection       'CrysAlis PRO'
_computing_data_reduction        'CrysAlis PRO'
_computing_molecular_graphics    'OLEX2 (Dolomanov et al., 2009)'
_computing_publication_material  OLEX2
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 10.3592
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Xcalibur, Atlas, Gemini ultra'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0422
_diffrn_reflns_av_sigmaI/netI    0.0221
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            11501
_diffrn_reflns_theta_full        67.45
_diffrn_reflns_theta_max         67.45
_diffrn_reflns_theta_min         4.46
_exptl_absorpt_coefficient_mu    0.714
_exptl_absorpt_correction_T_max  0.7881
_exptl_absorpt_correction_T_min  0.7535
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlis PRO (Agilent Technologies, 2011) 
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.248
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             696
_exptl_crystal_size_max          0.42
_exptl_crystal_size_mid          0.38
_exptl_crystal_size_min          0.35
_refine_diff_density_max         0.175
_refine_diff_density_min         -0.135
_refine_diff_density_rms         0.033
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.4(4)
_refine_ls_extinction_coef       0.0041(5)
_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   1.094
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     222
_refine_ls_number_reflns         1796
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.094
_refine_ls_R_factor_all          0.0514
_refine_ls_R_factor_gt           0.0425
_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^)+(0.0611P)^2^+0.2592P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1074
_refine_ls_wR_factor_ref         0.1170
_reflns_number_gt                1548
_reflns_number_total             1796
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4qo00163j2.cif
_cod_data_source_block           130718_mdk_2_098
_cod_database_code               1553017