| |
articol de periodic |
1988 |
Revue Roumaine de Chimie, 33-3 |
EL-SHAFEI, A.K. (autor)
,
EL-SAYED, A.M. (autor)
|
Studies on the nucleophilic reactivity of sulphur and nitrogen in 2-mercapto-4(3H)quinazolinone under solid-liquid phase transfer catalysis contitions |
|
291-293 |
|
| |
articol de periodic |
1993 |
Revue Roumaine de Chimie, 38-10 |
EL-SAYED, A.M. (autor)
,
KASEM, Ahmed (autor)
,
ABASS, Tarek (autor)
,
EL-TOUKHY, Ahmed (autor)
,
MASSR, Mahmoud (autor)
|
New synthesis of monomeric and polymeric saccharide bis-hydrazide diamines salts. Reaction of 2,3,4,5-tetra-o-acetylgalactaric acid bis-hydrazides with different diamines |
|
1241-1248 |
|
| |
articol de periodic |
1993 |
Revue Roumaine de Chimie, 38-12 |
EL-SAYED, A.M. (autor)
,
EL-SGAFEI, A.K. (autor)
|
Catalytic alkylation of some S.H, N.H, O-H or C.H containing aliphatic, aromatic, heteroaromatic or sugar moeities using bicyclic pyrazoline derivative in solid.liquid two-phase systems |
|
1477-1483 |
|
