One-pot organocatalytic enantioselective Michael-Michael-aldol-Henry reaction cascade. A facile entry to the steroid system with six contiguous stereogenic centers.
Jhuo, Dai-Huei; Hong, Bor-Cherng; Chang, Chun-Wei; Lee, Gene-Hsiang; Organic letters 16 (2014) 2724–2727; doi:10.1021/ol501011t

data_1515978
_publ_section_title
;
 One-pot organocatalytic enantioselective Michael-Michael-aldol-Henry
 reaction cascade. A facile entry to the steroid system with six
 contiguous stereogenic centers.
;
_journal_issue                   10
_journal_name_full               'Organic letters'
_journal_page_first              2724
_journal_page_last               2727
_journal_paper_doi               10.1021/ol501011t
_journal_volume                  16
_journal_year                    2014
_chemical_absolute_configuration ad
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_diffrn_reflns_limit_l_min       -8
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_diffrn_reflns_theta_min         1.28
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_exptl_absorpt_correction_T_max  0.8904
_exptl_absorpt_correction_T_min  0.3828
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.564
_exptl_crystal_density_meas      ?
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_exptl_crystal_description       needle
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_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.023(9)
_refine_ls_extinction_method     none
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_refine_ls_number_reflns         8031
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_refine_ls_R_factor_all          0.0711
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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^)+(0.0552P)^2^+0.2165P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1157
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_cod_data_source_file            ol501011t_si_004.cif
_cod_data_source_block           ic16485
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 

 Adding full bibliography for 1515977--1515979.cif.

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not_measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_sg_symbol_H-M      P2(1)2(1)2
_cod_database_code               1515978