✦ LIBER ✦

Oligonucleotide Synthesis with Trichloroacetonitrile

✍ Scribed by Prof. Dr. F. Cramer; Dr. H. J. Baldauf; cand. ing. H. Küntzel

No coin nor oath required. For personal study only.

✦ Synopsis

to l-azacyclohepta-4,7-diene-2-one (IV) and prototropic rearrangement [3]. Attempts to convert (V) into the hitherto unknown azepine, or its derivatives, are in progress. For the liquid isomer (VI), the structure of a 2-vinylcyclopropyl isocyanate was proven by IR spectral and nuclear magnetic resonance data. Since (V) is to be considered as the rearrangement product of (III), (VI) must have the trans configuration. trans-2-Vinylcyclopropyl isocyanate has remarkable thermal stability. Even when heated for 2 hours to 200 "C., it is only slightly polymerized.

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