Novel ring transformations of pyrazines by intramolecular diels-alder reactions
โ Scribed by D.A. De Bie; A. Ostrowica; G. Geurtsen; H.C. Van Der Plas
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- French
- Weight
- 573 KB
- Volume
- 44
- Category
- Article
- ISSN
- 0040-4020
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
SuImkWyz 5-Nitropyrlrmdme undergoes lIlverse Diels-Alder cycloaddltlons w1t.h ketene-N,N-, -O,Cacetals and enanunes resulting 111 pyrl&ne derlvatlves. The 'H NMR evidence for the I-N,N-diethylmopropyne cycloadduct formation 1s presented mng transformations of s-tetrazmes proceeding via an inverse el
Syntheses of several 6,6,6-tricyclic condensed pyridines and pyrazines utilizing intramolecular Diels-Alder reactions of 1,2,4-triazines with alkyne and nitrile dienophiles are detailed. The cyclizations are facilitated by the presence 01 conformationally restrictive planar aromatic rings in the cha