Jasiński R, Kwiatkowska M, Sharnin V, Barański A. Experimental and theoretical studies of Diels-Alder reaction between methyl (
Z)-2-nitro-3-(4-nitrophenyl)-2-propenoate and cyclopentadiene.
MONATSHEFTE FUR CHEMIE 2013;
144:327-335. [PMID:
26166878 PMCID:
PMC4495048 DOI:
10.1007/s00706-012-0885-3]
[Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2012] [Accepted: 11/21/2012] [Indexed: 11/18/2022]
Abstract
Abstract
The Diels–Alder reaction between methyl (Z)-2-nitro-3-(4-nitrophenyl)-2-propenoate and cyclopentadiene yields a mixture of carbodiene Diels–Alder adducts. B3LYP/6–31G(d) simulations indicate that the conversion of addends into methyl (1R*,2S*,3S*,4R*)-2-nitro-3-(4-nitrophenyl)-bicyclo[2.2.1]hept-5-ene-2-carboxylate occurs via two-stage heterodiene Diels–Alder reaction and (in a second step) skeleton rearrangement of the primary cycloadduct, whereas the reaction leading to methyl (1R*,2R*,3R*,4R*)-2-nitro-3-(4-nitrophenyl)-bicyclo[2.2.1]hept-5-ene-2-carboxylate is a single-step process.
Graphical abstract
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