Lewis acids promoted formal intramolecular [3 + 2] parallel and cross-cycloadditions of cyclopropane 1,1-diesters with allenes.
Wang, Zhenjun; Ren, Jun; Wang, Zhongwen; Organic letters 15 (2013) 5682–5685; doi:10.1021/ol402662j

data_1513114
_publ_section_title
;
 Lewis acids promoted formal intramolecular [3 + 2] parallel and
 cross-cycloadditions of cyclopropane 1,1-diesters with allenes.
;
_journal_issue                   22
_journal_name_full               'Organic letters'
_journal_page_first              5682
_journal_page_last               5685
_journal_paper_doi               10.1021/ol402662j
_journal_volume                  15
_journal_year                    2013
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_space_group_name_Hall           '-P 2ybc'
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_symmetry_space_group_name_Hall  '-P 2ybc'
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_cell_angle_beta                 111.823(9)
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_diffrn_measurement_device_type  'Rigaku Saturn724 CCD'
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_diffrn_reflns_point_group_measured_fraction_full 1.000
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_refine_ls_number_reflns         8507
_refine_ls_number_restraints     0
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_refine_ls_R_factor_all          0.0582
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_refine_ls_structure_factor_coef Fsqd
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; 
 w=1/[\s^2^(Fo^2^)+(0.0574P)^2^] 
 where P=(Fo^2^+2Fc^2^)/3 
;
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_shelx_res_checksum              83250
_shelx_hkl_checksum              32719