Organocatalytic Enantioselective Direct Vinylogous Michael Addition of α,β-Unsaturated γ-Butyrolactam to β-Acyl Acrylates and 1,2-Diacylethylenes.
Chen, Yi-Ru; Das, Utpal; Liu, Meng-Hsien; Lin, Wenwei; The Journal of organic chemistry 80 (2015) 1985–1992; doi:10.1021/jo5027047

data_4030457
_publ_section_title
;
 Organocatalytic Enantioselective Direct Vinylogous Michael Addition of
 \a,\b-Unsaturated \g-Butyrolactam to \b-Acyl Acrylates and
 1,2-Diacylethylenes.
;
_journal_issue                   3
_journal_name_full               'The Journal of organic chemistry'
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_journal_paper_doi               10.1021/jo5027047
_journal_volume                  80
_journal_year                    2015
_chemical_formula_moiety         'C23 H28 Br N O5'
_chemical_formula_sum            'C23 H28 Br N O5'
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_cell_length_a                   15.5689(7)
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_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      0
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_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1986)'
_diffrn_ambient_temperature      200(2)
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_diffrn_measured_fraction_theta_max 0.969
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_diffrn_radiation_type           MoK\a
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_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colorless
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_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
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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^)+(0.0446P)^2^+0.4272P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
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_reflns_threshold_expression     >2sigma(I)
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_cod_depositor_comments
'Adding full bibliography for 4030454--4030457.cif.'
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4030457