82360-26-7Relevant academic research and scientific papers
Enamines and iminium salts from amino-acids
McHintosh, John M.,Pillon, Lilianna Z.,Acquaah, Samuel O.,Green, James R.,White, Graham S.
, p. 2016 - 2021 (2007/10/02)
Distillation of ω-carboxyalkyl lactams from soda-lime leads to the formation of bicyclic enamines or imines with concomitant loss of carbon dioxide and water.Monoamides of dicarboxylic acids afford cyclic ketones.A mechanistic rationale is presented and it is concluded that the reaction is a variant of the classical Ruzicka cyclization of dicarboxylic acids.The method allows the regiospecific formation of iminium salts of bicyclic nitrogen heterocycles.
AZAPROPELLANES AS PHASE-TRANSFER CATALYSTS-II A CMR AND PMR STUDY OF THE THREE-DIMENSIONAL STRUCTURE OF 1-AZONIAPROPELLANES CONTAINING 5- AND 6-MEMBERED RINGS
McIntosh, John M.
, p. 261 - 266 (2007/10/02)
An improved synthesis of 1-azoniatricyclo1,6>tridecane (2) and the preparation of the remaining member of the series, 1-azoniatricyclo1,6>dodecane salts (3) have been achieved.Using a combination of 1H (at 400 MHz) and 13C NMR spectra has allowed the assignment of the signals in the well-resolved 1H spectra.The results indicate that 1 exists in the all-chair form which undergoes racemisation by ring inversion with a rate constant of 0.7 sec-1 and further that the counterion in these salts is restricted to associating with only one face of the tetrahedral N atom.
Synthesis of Δ1- and/or Δ8-Dehydroindolizidines and Related Compounds
Miyano, Seiji,Fujii, Shinichiro,Yamashita, Osamu,Toraishi, Naoko,Sumoto, Kunihiro
, p. 1465 - 1468 (2007/10/02)
A facile synthesis of Δ1- and/or Δ8-dehydroindolizidine and related compounds, consisting of dry distillation of γ-(N-2-piperidinonyl)butyric acid over soda-lime, is described.Reductions of these dehydroindolizidines and stereochemistry of 1-methylindolizidine are also described.
