This book highlighted the methods used for the synthesis of some new pyrimidine compounds. The reactivity of pyrimidine and their synthetic importance were investigated. It also reported a good introduction for the literature survey of the chemistry of pyrimidine compounds. In this context, we reported herein the behavior of simple reagents in order to obtain some new pyrimidine ring systems and its reactivity towards different reagents for the constructions of heterocyclic derivatives containing a pyrimidine moiety. The methods of synthesis and the synthetic mechanisms of the aforementioned...

Water-in-crude oil emulsions stabilized by natural surface-active components (such as asphaltene) are one of the major problems in relation to petroleum production. New water soluble nonionic amphiphilic block and graft copolymers based on hydrophilic PEG and PPO were prepared. PEG-PPO-PEG copolymers were prepared in the normal condition by two methods to use them as demulsifiers for crude oil emulsions. The first step in this work is to polymerize propylene glycol and propylene oxide to produce poly (propylene glycol) PPO. The reaction time was adjusted to produce PPO having different...