Process for the preparation of pyrrolidone derivatives
申请人:I.S.F. Societa Per Azioni
公开号:US04797496A1
公开(公告)日:1989-01-10
Process for preparing pyrrolidinone derivatives of (1) ##STR1## in which R is hydrogen, alkyl or acyl characterized in that a compound of (2) ##STR2## wherein R.sup.1 is hydrogen and R.sup.2 is benzyl or substituted benzyl, or R.sup.1 and R.sup.2 can together form a group ##STR3## where R.sup.4 and R.sup.5 are independently hydrogen, alkyl, phenyl or optionally substituted aryl or together are 1,4-butylene or 1,5-pentylene; R.sup.3 is hydrogen or straight or branched alkyl of 1 to 4 carbon atoms; and X is alkyl subjected to N-deprotection and the deprotected intermediate is cyclized intramolecularly. The deprotected intermediates can be isolated as acid-addition salts.
PIFFERI G.; PINZA M., FARMACO ED. SCI. <FRPS-AX>, 1977, 32, NO 8, 602-613
作者:PIFFERI G.、 PINZA M.
DOI:——
日期:——
US4118396A
申请人:——
公开号:US4118396A
公开(公告)日:1978-10-03
US4797496A
申请人:——
公开号:US4797496A
公开(公告)日:1989-01-10
Pyrrolidine derivatives
申请人:I.S.F. S.p.A.
公开号:US04118396A1
公开(公告)日:1978-10-03
Pyrrolidin-2-one derivatives of the formula: ##STR1## wherein R represents hydrogen, an acyl radical containing from 2 to 7 carbon atoms, a saturated or unsaturated alkyl, containing from 1 to 6 carbon atoms, aralkyl, cycloalkyl or aromatic, R.sub.1 and R.sub.2 may be the same or different and represent hydrogen, a saturated or unsaturated alkyl radical, containing from 1 to 3 carbon atoms, cycloalkyl radical or R.sub.1 and R.sub.2, together with the adjacent nitrogen atom, may form an heterocyclic ring optionally containing an additional heteroatom selected from the group consisting of oxygen and nitrogen, n represents an integer from 0 to 2 inclusive, and the process for their preparation are described.