The Evolution of Caffeine: From Discovery to Modern Use

Caffeine, a central nervous system stimulant, has a rich history that reflects its significant role in human culture. The story begins in 1819 when German chemist Friedrich Ferdinand Runge first identified caffeine. Runge's discovery was part of his broader exploration into the chemical compounds found in natural substances. He coined the term "kaffein" from the German word "Kaffee" for coffee, which later evolved into the English term "caffeine." Runge’s meticulous extraction of caffeine from coffee beans in 1821 marked the beginning of a new chapter in the scientific understanding of stimulants.

The practical applications of caffeine extended beyond coffee. In the 1880s, the world saw the introduction of its first caffeinated soft drinks. These early beverages, such as Coca-Cola, were developed during a period of growing interest in medicinal and stimulating properties of natural compounds. The incorporation of caffeine into soft drinks was a pioneering effort that significantly influenced the beverage industry, shaping consumer habits and tastes.

The regulatory recognition of caffeine’s safety marked another milestone. In 1958, the American Food and Drug Administration (FDA) classified caffeine as Generally Recognized As Safe (GRAS). This designation was crucial in establishing caffeine as a widely accepted ingredient in food and beverages, underscoring its safety when consumed in moderate amounts. The GRAS status facilitated the inclusion of caffeine in numerous products, contributing to its ubiquitous presence in modern diets.

The journey of caffeine from its discovery to its widespread use reflects its profound impact on both science and culture. Its evolution from a curious chemical compound to a staple in various consumables highlights its significance in daily life and the ongoing interest in its effects and benefits.
The Evolution of Caffeine: From Discovery to Modern Use

Extraction of caffeine in history

Caffeine is a simple purine base compound and it is a moderately soluble about 2 g/100 mL in water at room temperature. It tastes bitter, white, odorless substance with melting point 235-238 °C. Coffee and tea have owed stimulant properties to caffeine, a simple trimethyl purine derivative.

“The Canon of Medicine”, written in 1025 by the Persian physician Avicenna, is the first text mentioning coffee as a medication. At the time, coffee was used to “clean the skin, dry up the humidities that are under it, and give a better odor to the body”.

In 1819, the German chemist Friedrich Ferdinand Runge (1795-1865) first time isolated pure caffeine in laboratory; he also called it as "Kaffebase" that exists in coffee. According to Runge, he did this at the request of Johann Wolf-Gang von Goethe, a German writer and statesman who had gifted Runge with a case of coffee beans.

In 1821, caffeine was isolated both by the French chemist Pierre Jean Robiquet and by further another pair of French chemists, Pierre-Joseph Pelletier and Joseph Bienaimé Caventou, according to a journal article by Jöns Jacob Berzelius. Further experiments were done according to Berzelius.

Berzelius stated that the French chemists had made their discoveries independently of any knowledge of Runge's work or of each other’s work. Berzelius states ‘caffeine is a substance in coffee’, which simultaneously, in 1821, was discovered by Robiquet and by Pelletier and Caventou, by whom however nothing was made known about it in print.

Robiquet was one among the first to isolate and outlined the properties of pure caffeine whereas Pelletier was the first to execute an elemental analysis.

In 1827, M Oudry isolated "theine" from tea, but it was later proved by Mulder and Carl Jobst that theine was the same as caffeine.

In 1895, German chemist Hermann Emil Fischer (1852-1919) first synthesized caffeine from its chemical components and that was a total synthesis. Then two years later, he as well derived the structural formula of the compound. The study of caffeine was also his first major effort, published when he was 29 30 years of age. Using oxidation with moist chlorine, he found that caffeine had a similar heterocyclic skeleton as uric acid. He then found that it was a trimethylxanthine, but he struggled for some time to clarify the structure of xanthine. However, it was only when Fischer turned to a synthetic approach to structure that he finally correctly realized that the xanthine structure proposed by Ludwig Medicus (1847-1915) prior to Fischer was the correct one.

Fischer was awarded the Nobel Prize in 1902.
Extraction of caffeine in history 

A story of discovery of coffee

According to the legend, coffee originated from Africa in A.D. 800. Kaldi, a legendary Ethiopian goatherd, noticed his herd dancing from one coffee shrub to another, grazing on the cherry-red berries containing the beans and picked he tried the berries himself and felt the same.

The red cherries which the sheep ate and become very active were taken home and the berries were the fruit of the coffee tree.

Sometime later, a passing monk observed Kaldi and the goats. When Kaldi told him about the berries, the monk thought they might be the answer to his prayers — literally. It seems that the monk was always falling asleep in the middle of prayers. When he ate the berries, he stayed awake.

Another tale which has been around for some time involves an Arabian who uses coffee beans to survive an exile and was discovered near the town of Mocha and thus it was refer to coffee as Mocha.

Coffee soon became the accepted drink of the Arab world. For a long time, it was traded locally.

As everyone know it, originated in Arabia where the first roasted coffee beans were brewed around A.D. 1000. By the thirteenth century, Muslims drank coffee religiously and wherever the Islam went, coffee went too.
A story of discovery of coffee