Allenylphosphonates/Allenylphosphine Oxides as Intermediates/Precursors for Intramolecular Cyclization Leading to Phosphorus-Based Indenes, Indenones, Benzofurans, and Isochromenes
K. V. Sajna; K. C. Kumara Swamy; Journal of Organic Chemistry 77 (2012) 5345–5356; doi:10.1021/jo300705f

data_4027246
_publ_section_title
;
 Allenylphosphonates/Allenylphosphine Oxides as Intermediates/Precursors
 for Intramolecular Cyclization Leading to Phosphorus-Based Indenes,
 Indenones, Benzofurans, and Isochromenes
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              5345
_journal_page_last               5356
_journal_paper_doi               10.1021/jo300705f
_journal_volume                  77
_journal_year                    2012
_chemical_formula_sum            'C24 H21 O2 P'
_chemical_formula_weight         372.38
_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   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 105.794(8)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.6332(6)
_cell_length_b                   19.8814(18)
_cell_length_c                   15.5910(14)
_cell_measurement_temperature    293(2)
_cell_volume                     1978.5(3)
_computing_cell_refinement       'CrysAlisPro, Oxford Diffraction Ltd'
_computing_data_collection       'CrysAlisPro, Oxford Diffraction Ltd'
_computing_data_reduction        'CrysAlisPro, Oxford Diffraction Ltd'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Xcalibur, Eos, Gemini'
_diffrn_measurement_method       '\w 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  0.0252
_diffrn_reflns_av_sigmaI/netI    0.0377
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            7918
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.90
_diffrn_standards_decay_%        none
_diffrn_standards_interval_count 'not applicable'
_diffrn_standards_interval_time  'not applicable'
_diffrn_standards_number         'not applicable'
_exptl_absorpt_coefficient_mu    0.154
_exptl_absorpt_correction_T_max  0.982
_exptl_absorpt_correction_T_min  0.969
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'CrysAlisPro, Oxford Diffraction Ltd'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.250
_exptl_crystal_description       blocks
_exptl_crystal_F_000             784
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.17
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.463
_refine_diff_density_min         -0.231
_refine_diff_density_rms         0.041
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.026
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     246
_refine_ls_number_reflns         3465
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.026
_refine_ls_R_factor_all          0.0699
_refine_ls_R_factor_gt           0.0518
_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^)+(0.0542P)^2^+1.0779P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1222
_refine_ls_wR_factor_ref         0.1307
_reflns_number_gt                2741
_reflns_number_total             3465
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo300705f_si_001_2.cif
_cod_data_source_block           compd-38
_cod_database_code               4027246