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To determine local chirality driven conformational preferences of small aminocyclobutane-1-carboxylic acid derivatives, X-(ACBA)n-Y, their matrix-isolation IR spectra were recorded and analyzed. For the very first time model systems of this kind were deposited in a frozen (~10 K) noble gas matrix to reduce line width and thus, the recorded sharp vibrational lines were analyzed in details. For cis...
The synthesis of some representative compounds of a new class of cyclobutane-containing β-peptides starting from (−)-verbenone as a chiral precursor is presented. In these products, the cyclobutane moiety is not a part of the peptide backbone but a bulky substituent at the β 3 -position. These compounds have been carefully characterized and studied on the basis of the combined use of several...
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