Pyrrolodiazines. 2. Structure and chemistry of pyrrolo[1,2-a]pyrazine and 1,3-dipolar cycloaddition of its azomethine ylides
A new synthesis of the pyrrolo[1,2-a]pyrazine system from pyrrole is described. In light of the ab initio calculations carried out on this heterocyclic system some of its basic chemistry was investigated and included electrophilic substitution, addition o
Minguez, Jose M.,Castellote, Maria I.,Vaquero, Juan J.,Garcia-Navio, Jose L.,Alvarez-Builla, Julio,Castano, Obis,Andres, Jose L.
The present invention relates to novel cephalosporin derivatives or pharmaceutically acceptable non-toxic salts thereof useful as antibiotics and to processes for the preparation thereof. STR1 wherein: R1 is a hydrogen or an optionally halogen-
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(2008/06/13)
AZACYCKLOALKANES. XXX. PYRROLOPYRAZINES WITH VARIABLE DEGREES OF PYRAZINE RING SATURATION AND THEIR HYPOTENSIVE ACTIVITY
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Peresada, V. P.,Medvedev, O. S.,Likhosherstov, A. M.,Skoldinov, A. P.