The phrase "a brief introductory" is correct and usable in written English.
It can be used when referring to a short introduction or overview of a topic, person, or event.
Example: "In this report, we will provide a brief introductory overview of the main findings."
Alternatives: "a short introduction" or "a concise overview."
NIELSEN: Make a brief introductory page that tells people very, very clearly what it is about.
The code begins with a brief introductory section setting forth the details of its application.
Mr. Murray did not appear in character, or anything close, in a brief introductory speech.
This event will also feature a brief introductory presentation by choreographer and dance scholar Debra McCall.
If you're negotiating over email, even a brief introductory phone call may make a difference.
Christopher Riopelle, the exhibition curator, will give a brief introductory talk, followed by a self-guided tour.
Mr. Baryshnikov is something of a whiz of a dancer too, and the brief introductory dances of Act I had him sailing through the air with unusual gentleness.
After Austad's brief introductory remarks, a scientist named Nir Barzilai tuned up his PowerPoint and launched into a practice run of the main presentation.
Mr. Bernanke spoke in brief introductory remarks at a conference in Moscow of the Group of 20, a club of the world's largest industrial and emerging economies.
Next stop was an hour with House Republicans, where Mr. Gates, after brief introductory remarks that did not touch on the court decision, forecast a technological future in which even technology-shy lawmakers would carry their daily schedules in a tablet device, and the Internet would be a staple of work and personal lives.
The study coordinator sent a brief personalized introductory letter to potential participants and called them approximately one week later to describe the study and nature of participation, as well as to verify eligibility.
