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Applications of pericyclic reactions||Biosynthesis of Vitamin D-D2-D3|ergocalciferol-cholecalciferol



Assalam o Alaikum in this lecture i am going to discuss Applications of pericyclic reactions OR Biosynthesis of Vitamin D-D2-D3. vitamin D2 is known as ergocalciferol and vitamin D3 is known as cholecalciferol. we synthesize cholecalciferol and ergocalciferol from their precurser. the precurser used are Ergosterol and 7-dehydrocholesterol.This lecture is delivered in Urdu ,Hindi and English. Vitamin D is the general name for two related compounds called cholecalciferol (vitamin D3) and ergocalciferol (vitamin D2). These two compounds differ in the identity of the side chain, R group.Vitamin D serves an important function in that it increases the body’s ability to metabolize the calcium present in the foods we eat. Calcium is essential because it is used in the formation of bones and teeth. A deficiency of vitamin D can cause the childhood disease called rickets, which is characterized by abnormal bone growth. Although most food does not contain substantial amounts of vitamin D, some food sources do contain the precursors that the body needs in order to synthesize vitamin D. Ergosterol is present in many vegetables, and 7-dehydrocholesterol is present in fish and dairy products.When the skin is exposed to sunlight, these precursors, located just beneath the skin, are converted into ergocalciferol and cholecalciferol respectively. For this reason, vitamin D is commonly called the “sunshine vitamin.” The precursors are converted into vitamin D via two successive pericyclic reactions.The first step is an electrocyclic ring-opening reaction, and the second step is a [1,7] sigmatropic rearrangement. This sequence of steps not only occurs in our bodies but is also utilized commercially to enrich milk with vitamin D3. All milk sold in the United States is irradiated with UV light, which converts the 7-dehydrocholesterol present in the milk into vitamin D3. Main contents that i have cover in this lecture are following:- 1) Applications of pericyclic reactions 2) Biosynthesis of Vitamin D &D2 &D3 by pericyclic reactions 3)Biosynthesis of ergocalciferol (vitamin D2) from Ergosterol . 4) Biosynthesis of cholecalciferol (vitamin D3) from 7-dehydrocholesterol 5)importance of pericyclic reactions 6) advantages of pericyclic reactions 7) pericyclic reactions importance in daily life. 8) structure of ergocalciferol (vitamin D2) 9) structure of cholecalciferol (vitamin D3 10)structure of Ergosterol 11)structure of 7-dehydrocholesterol Most useful videos for you:- 1-Chemical properties of Acid|Chemical reactions|10th class chemistry chapter 10|lecture in urdu,hindi https://youtu.be/cQkZE2IbQgo 2)Uses of pH, Chemistry Lecture | Authentic Education Channel|10th class chapter 10-Acid,Base & salts https://youtu.be/dM4UoP3Sw2Q 3)preservatives in food-How to preserve food at Home-A brief introduction|10th class chemistry lecture https://youtu.be/gKr1WWhK8PE 4)indicators/Methyl orange-litmus-Phenolphthalein/chemistry lecture in Urdu hindi and English|10TH https://youtu.be/s30Dqo1EnsY 5)uses of salts|10th class chemistry chapter 10|lecture in urdu hindi and english|Authentic education https://youtu.be/tXEUnvr7To0 6)Area of work for Analytical Chemists l10th class chemistry-chapter 10|lecture in Urdu,Hindi& English https://youtu.be/4N8hQhhX9ec 7) Uses of Bases-10th class chemistry|Lecture in Urdu,Hindi English|chapter 10|Authentic Education chan https://youtu.be/mt1wwsi5-j0 11)stomach acidity,hyperacidity,causes ,symptoms,prevention|10th class chemistry lecture in Urdu|online https://youtu.be/mYLL6PuUNQk 12)Removal of permanent hardness By using washing soda 10th class https://youtu.be/_6iukG1mZ1U 13)Removal of Temporary Water hardness by clarks method https://youtu.be/gO1fHgWhitY 14)Nucleophilic Aromatic substitution reactions https://www.youtube.com/playlist?list... 15)Electrophilic Aromatic substitution Reactions https://www.youtube.com/playlist?list... 16)10th class chemistry chapter 10 https://www.youtube.com/playlist?list... 17) 10th class chemistry chapter#15(water) https://www.youtube.com/playlist?list... 18)10th class chemistry chapter#9 chemical equilibrium https://www.youtube.com/playlist?list... Social Links :- Facebook:- https://web.facebook.com/Authentic-Ed... Twitter:- https://twitter.com/AuthenticEduca2 Blogger:- https://authenticchemist1.blogspot.com/ Whats App:- https://wa.me/923086683955 insta gram:- https://www.instagram.com/rashidshahz... #Applicationsofpericyclicreactions #BiosynthesisofVitaminDD2D3 #ergocalciferol #cholecalciferol #Ergosterol #7-dehydrocholesterol #AuthenticEducationChannel #organicchemistry

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