Angyal has contributed with distinction to several fields of organic chemistry but is notable particularly for two series of publications. One of these reports the elucidation of the mechanism of the reaction due to Sommelet for the preparation of aldehydes and studies of its applications and limitations. The more important series is concerned with the chemistry and stereochemistry of the cyclitols, particularly the biologically-significant inositols. In this field Angyal is one of the leaders, whose work has led to the isolation of all the isomeric inositols predicted by theory and the establishment of their configurations, as illustrated by an invitation to deliver a special lecture at the 1961 IUPAC Congress in Canada.