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_4027248
_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            'C26 H25 O2 P'
_chemical_formula_weight         400.43
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                97.442(5)
_cell_angle_beta                 98.266(6)
_cell_angle_gamma                90.151(5)
_cell_formula_units_Z            4
_cell_length_a                   9.892(3)
_cell_length_b                   11.884(4)
_cell_length_c                   18.630(6)
_cell_measurement_reflns_used    4816
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      23.82
_cell_measurement_theta_min      2.21
_cell_volume                     2148.6(12)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'CCD area detector'
_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     0.71073
_diffrn_reflns_av_R_equivalents  0.0402
_diffrn_reflns_av_sigmaI/netI    0.0457
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            20760
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.73
_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    0.147
_exptl_absorpt_correction_T_max  0.9797
_exptl_absorpt_correction_T_min  0.9684
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'SADABS, Sheldrick(1996)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.238
_exptl_crystal_description       plate
_exptl_crystal_F_000             848
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.17
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.406
_refine_diff_density_min         -0.260
_refine_diff_density_rms         0.054
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.114
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     523
_refine_ls_number_reflns         7550
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.114
_refine_ls_R_factor_all          0.0834
_refine_ls_R_factor_gt           0.0674
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0897P)^2^+0.6609P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1692
_refine_ls_wR_factor_ref         0.1789
_reflns_number_gt                6033
_reflns_number_total             7550
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo300705f_si_001_4.cif
_cod_data_source_block           compd-61
_cod_database_code               4027248