Lewis Base Switched [3+3] and [4+2] Annulation Reaction of δ-Acetoxy Allenoates with Cyclic N-Sulfonyl Imines: Divergent Synthesis of Functionalized α-Pyridyl Acetates and Teraryl Scaffolds.
Arupula, Sanjeeva K.; Qureshi, Asif Ali; Swamy, K. C. Kumara; The Journal of organic chemistry  (2020) –; doi:10.1021/acs.joc.9b03281

data_4037988
_publ_section_title
;
 Lewis Base Switched [3+3] and [4+2] Annulation Reaction of \d-Acetoxy
 Allenoates with Cyclic N-Sulfonyl Imines: Divergent Synthesis of
 Functionalized \a-Pyridyl Acetates and Teraryl Scaffolds.
;
_journal_name_full               'The Journal of organic chemistry'
_journal_paper_doi               10.1021/acs.joc.9b03281
_journal_year                    2020
_chemical_formula_sum            'C21 H19 N O3'
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_atom_sites_solution_secondary   difmap
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_cell_measurement_theta_min      2.1040
_cell_volume                     3432.35(18)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type
'XtaLAB Synergy, Single source at offset/far, HyPix3000'
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_diffrn_radiation_monochromator  graphite
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_diffrn_reflns_limit_h_max       27
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_diffrn_reflns_limit_l_min       -34
_diffrn_reflns_number            27023
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.11
_exptl_absorpt_coefficient_mu    0.086
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.290
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Needles
_exptl_crystal_F_000             1408
_exptl_crystal_size_max          0.1
_exptl_crystal_size_mid          0.02
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.462
_refine_diff_density_min         -0.204
_refine_diff_density_rms         0.041
_refine_ls_extinction_method     None
_refine_ls_goodness_of_fit_ref   1.070
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     228
_refine_ls_number_reflns         3025
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.070
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_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0972P)^2^+0.5036P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1591
_refine_ls_wR_factor_ref         0.1916
_reflns_number_gt                1826
_reflns_number_total             3025
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo9b03281_si_002.cif
_cod_data_source_block           Compound3aa
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_exptl_absorpt_correction_type' value 'None' was changed
to 'none' in accordance with the
/home/data/users/saulius/crontab/automatic-downloads/rss-feeds/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

Automatic conversion script
Id: cif_fix_values 7556 2019-12-06 15:28:31Z antanas 
;
_cod_original_cell_volume        3432.35(19)
_cod_database_code               4037988