Annulation Reaction of 3-Acylmethylidene Oxindoles with Huisgen Zwitterions and Its Applications in the Syntheses of Pyrrolo[4,3,2-de]quinolinones and Marine Alkaloids Ammosamides.
Yang, Changjiang; Chen, Xiangyu; Tang, Tong; He, Zhengjie; Organic letters 18 (2016) 1486–1489; doi:10.1021/acs.orglett.6b00456

data_1542621
_publ_section_title
;
 Annulation Reaction of 3-Acylmethylidene Oxindoles with Huisgen
 Zwitterions and Its Applications in the Syntheses of
 Pyrrolo[4,3,2-de]quinolinones and Marine Alkaloids Ammosamides.
;
_journal_issue                   6
_journal_name_full               'Organic letters'
_journal_page_first              1486
_journal_page_last               1489
_journal_paper_doi               10.1021/acs.orglett.6b00456
_journal_volume                  18
_journal_year                    2016
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_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
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_cell_angle_beta                 74.155(12)
_cell_angle_gamma                87.858(13)
_cell_formula_units_Z            2
_cell_length_a                   10.4200(13)
_cell_length_b                   11.5670(15)
_cell_length_c                   12.2330(17)
_cell_measurement_reflns_used    5105
_cell_measurement_temperature    113(2)
_cell_measurement_theta_max      33.10
_cell_measurement_theta_min      2.00
_cell_volume                     1227.9(3)
_computing_cell_refinement       'CrystalClear-SM Expert 2.0 r4'
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_diffrn_ambient_temperature      113(2)
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_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type  'Rigaku Saturn724 CCD'
_diffrn_measurement_method       \w
_diffrn_radiation_type           MoK\a
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_diffrn_reflns_limit_l_min       -18
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_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.989
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_exptl_crystal_colour            colorless
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_refine_ls_restrained_S_all      1.033
_refine_ls_R_factor_all          0.0658
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_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
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'w=1/[\s^2^(Fo^2^)+(0.0684P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
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_reflns_number_gt                6850
_reflns_number_total             9249
_reflns_threshold_expression     'I > 2\s(I)'
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_cod_depositor_comments
'Adding full bibliography for 1542621--1542626.cif.'
_cod_original_formula_sum        'C26 H28 N3 O7.50'
_cod_database_code               1542621
_shelx_estimated_absorpt_t_min   0.976
_shelx_estimated_absorpt_t_max   0.980
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_shelx_res_checksum              35304
_shelx_hkl_checksum              85476