✍ Scribed by Roberto Ballini; Giovanna Bosica
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Abstroct: ct,to-Dicarboxylic acid dimethxl esters are easily obtained by ring clcasagc ol ttnitrocycloalkanones. Thus, reaction ol the latter compounds ~vith three cquixalents of potassium persullatc, in methanol and in presence o1 sulfuric acid at 80 °C, provides ct.to-dicarboxxltc acid dimethyl esters in high yields. Long-chain, and alkylatcd ot,to-dicarboxylic acid dimethyl esters can be also cl[icicntl 3 obtained.
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## Abstract The efficient synthesis of eight new macrocyclic amides (lactams) __via__ reaction of diesters with diamines under normal dilution conditions is described. The role of intermolecular H‐bond formation and steric hindrance is discussed based on ^1^H‐ and ^15^N‐NMR studies of appropriate m
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