Sample HC, Twamley B, Senge MO. Structure of (
R,
R)-4-bromo-2-{4-[4-bromo-1-(4-toluene-sulfon-yl)-1
H-pyrrol-2-yl]-1,3-di-nitro-butan-2-yl}-1-(4-toluene-sulfon-yl)-1
H-pyrrole, another ostensible by-product in the synthesis of
geminal-dimethyl hydro-dipyrrins.
Acta Crystallogr E Crystallogr Commun 2023;
79:592-595. [PMID:
37601579 PMCID:
PMC10439434 DOI:
10.1107/s2056989023004644]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Accepted: 05/25/2023] [Indexed: 08/22/2023]
Abstract
The crystal structure of (R,R)-4-bromo-2-{4-[4-bromo-1-(4-toluene-sulfon-yl)-1H-pyrrol-2-yl]-1,3-di-nitro-butan-2-yl}-1-(4-toluene-sulfon-yl)-1H-pyrrole (1, C26H24Br2N4O8S2) is presented. The title compound was isolated in suitable yield as a by-product in our synthesis of geminal-dimethyl hydro-dipyrrins. We observe an unforeseen enanti-omeric resolution both in the bulk sample and the crystal of 1, with distinct C-H⋯O (Cmeth-yl-H⋯Onitro, Csp 3-H⋯Osulfon-yl) inter-actions observed in the enanti-omers present, along with other inter-actions, namely C5-pyrrol-yl-H⋯Osulfon-yl, forming a polymer along the crystallographic c-axis direction. Whilst pyrrolic fragments are well documented in the literature, little data is found surrounding the 1,3-di-nitro-butane scaffold.
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