The chemistry of 1,3,4-oxadiazole derivatives

CONTENTS
I. Introduction 508
II. Preparation of mono-substituted 1,3,4-oxadiazoles 508
III. Preparation of symmetrical 2,5-substituted 1,3,4-oxadiazoles 508
IV. Preparation of asymmetrical 2,5-substituted 1,3,4-oxadiazoles 509
V. Preparation of poly-1,3,4-oxadiazoles 511
VI. Properties and uses of 1,3,4-oxadiazole derivatives 512