106020-09-1Relevant articles and documents
DIHYDROISOXAZOLOBENZODIAZEPINE RING SYSTEM: STEREOCHEMISTRY AND CONFORMATION
Capozzi, Giuseppe,Ottana, Rosaria,Romeo, Giovanni,Uccella, Nicola
, p. 3087 - 3095 (2007/10/02)
The configurational properties of dihydroisoxazolobenzodiazepine derivatives, obtained by 1,3-dipolar cycloaddition between chlordiazepoxide and various substituted alkynes, have been determined by 1H nmr spectroscopy, largery by computer-simulation of lanthanide induced shifts (LIS).Cycloadducts exist in solution as 3:2 mixture of two interconvertible diastereoisomers, which are the result of heptaatomic ring mobility.The stereochemistry of examined derivatives has been found appropriate to determine the further rearrangement to pyrrole-fused quinoxalines, observed in this new tricyclic system.