There are a variety of synonyms for the phrase "precursor to chain of meetings." Some similar phrases include "prologue to a series of meetings," "starter of a sequence of meetings," "initial step in a string of meetings," and "beginning of a succession of meetings." Other synonyms could include "opening move in a set of conferences," "foreword to a cycle of meetings," "introductory phase to a round of meetings," or "preamble to a chain of meetings." Each of these phrases highlights the idea that one meeting sets the stage for a series of gatherings to follow, and suggests that the first meeting is important for establishing the tone and direction of the subsequent talks.