In this lecture, Kwame Anthony Appiah goes a bit into Amo Afer's life, including discrimination he suffered as professor in modern-day Germany. According to his wiki article he was " brought to Germany by the Dutch West India Company in 1707 as a child, and given as a gift to Dukes August Wilhelm and Ludwig Rudolf von Wolfenbüttel, he was treated as a member of the family ... For his further studies Amo moved to the University of Wittenberg, studying logic, metaphysics, physiology, astronomy, history, law, theology, politics, and medicine, and mastered six languages (English, French, Dutch, Latin, Greek, and German). ... Amo returned to the University of Halle to lecture in philosophy under his preferred name of Antonius Guilelmus Amo Afer. In 1736 he was made a professor." This was clearly exceptional for the time , but what do we know about his own views (eg on philosphy and/or slavery) and others' reactions to him?
edit: As a mod I can see that some are confused about my wording: I don't mean that Amo Afer travelled in time, but that he was from Accra in West Africa, what is now the capital of Ghana and was then on the Gold Coast.
His first disputation (in Latin) was “De Jure Maurorum in Europa” (The rights of blacks in Europe) so it is known that he didn’t lose his identity and thought about people from his native continent.
However, from 1730 onwards, he devoted himself to study of Natural Sciences rather than focus on Ethics or race relations. His inaugural dissertation was then on “De Humanae Mentis Apatheia” (The Absence of Sensation and the Faculty of Sense in the Human Mind and their Presence in our Organic and Living Body) was a mix of philosophy and medicine and had nothing to do with racial relationships. If you are interested, he was a supporter of modified materialism.
He returned to Halle in 1735 and taught a range of subjects, but specializing in exploring the relationship between the mind and body. This is indicated by the title of compilation of his lectures: “Tractatus de Arte Sobrie et Accurate Philosophandi” (Treatise on the Art of Philosophising Soberly and Accurately). It had nothing to do with race relations. He was known for chairing sessions defending doctoral theses that had themes close to his own which made a distinction between mind and our organic bodies. He was chairman of session where Johannes Theodosius Meiner defended his own thesis.
In 1740, he moved to University of Jena but was unhappy due to prejudice there. Eventually, in 1746, he left Germany for motherland. Once he left Germany, voices against him became more vocal since he was no longer able to defend himself. In west-Africa, the Dutch found his first disputation and saw him as a danger against their colonial rule. He was arrested, taken to a Dutch coastal fortress, and died there in 1784. We don’t know about his quality of life within the fortress but it is likely that he was not jailed, just put under house arrest. Nevertheless, he produced no more works (or if he did, they were destroyed/unpublished). So, we don't know what happened to him there.
For further reading:
Bernile would be of interest to you since he summarizes the main works of Amo and hence will allow you to learn what he was mostly interested in.
Lochner, Norbert. "Anton Wilhelm Amo: A Ghana Scholar in Eighteenth Century Germany." Transactions of the Historical Society of Ghana 3.3 (1958): 169-179.