Natural Product Synthesis: Eunicin, Palauamide and asimitrin has been divided into three chapters and each chapter subdivided into following sections: Introduction, Experimental and Characterisation and General References. Chapter I describes the synthetic studies toward tricyclic cembranoids: a modular approach for the construction of the tricyclic, framework of eunicin. Chapter II deals with studies toward biologically active Palauamide. Chapter III discusses synthetic studies toward Asimitrin using chiral pool strategy.