Synthese de pyrroles et d'oxazoles par pyrolyse de N-(hydroxy-2′ ethyl) amino-3 propenoate
作者:Catherine Pale-Grosdemange、Josselin Chuche
DOI:10.1016/s0040-4020(01)81018-8
日期:1989.1
pyrolysis of various N-(2′-hydroxyethyl)-3-amino propenoates 1–6 and N-(2′-hydroxy-2′-phenyl ethyl)-3-amino propenoate 7–9 at 390°–420°C leads respectively to formylpyrroles 11–16 and benzoylpyrroles 17–19 and, in some cases, to substituted oxazoles 36–39. The results are best explained by the intermediate formation of dicarbonyl derivative followed either by an intramolecular thermal crotonisation
Pyrroloylpyrrole derivatives, processes for their preparation and their use
申请人:BEECHAM GROUP PLC
公开号:EP0032048A1
公开(公告)日:1981-07-15
Compounds of formula (I):
and pharmaceutically acceptable salts and pro-drugs thereof, wherein:
R1 and R2 are the same or different and are hydrogen, halogen or C1-4 alkyl;
R3 is hydrogen or C1-6 alkyl
R4 is hydrogen or methyl; and
n is 0 or 1 having useful pharmacological activity, processes for their preparation and their use