This book is about Prof. Dr. Marwa Ahmed Mohamed Shehab El Sherif and is including all her scientific work. She was born in Sohaj, Egypt. She is an Egyptian Associate professor at Applied Organic Chemistry Department, National Research Center, Egypt. Her main research topic is reactions of cyanothioformamides with both electrophilic and nucleophilic reagents to produce, pyrrole, imdazole, oxazole, thiazole, thiadiazole, bis (imidazole and oxazole) derivatives. While that with some nucleophiles furnished benzoxazole, quinaolinone, triazole, bis-triazole, benzoxazinethione and thiadiazole derivatives, these are key components of many bio active compounds as anticancer, antiviral, antibacterial and anti-fungal agents.