MWF_21 - Organic Lecture Series CH 310/318 M LECTURE 21...

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Organic Lecture Series 1 CH 310/318 M LECTURE 21 Textbook Assignment: Chapter 7- Alkynes Today’s Topics: Alkyne Alkyne reactions reactions Notice & Announcements: POW 7 posted Organic Lecture Series 2 Alkynes Alkynes Chapter 7 Chapter 7
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Organic Lecture Series 3 RU RU -486, The 486, The “Abortion Abortion ” Pill Pill RU RU -486 acts as an 486 acts as an antagonist antagonist – a drug a drug that fits into a receptor that fits into a receptor site, but does not have site, but does not have the customary effect the customary effect as does another drug; as does another drug; in this case the other in this case the other drug (hormone) is drug (hormone) is progesterone. progesterone. Organic Lecture Series 4 •The p K a of acetylene and terminal alkynes is approximately 25, which makes them stronger acids than ammonia but weaker acids than alcohols (Section 4.1). – Terminal alkynes react with sodium amide to form alkyne anions. NH 2 H-C C-H H-C C: - 3 + p K a 38 (Weaker acid) p K a 25 (S tro ng er acid) + Acidity Acidity
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Organic Lecture Series 5 – Terminal alkynes can also be converted to alkyne anions by reaction with sodium hydride or lithium diisopropylamide (LDA).
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This note was uploaded on 11/07/2010 for the course CH 101 taught by Professor Dude during the Spring '10 term at Williamson.

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MWF_21 - Organic Lecture Series CH 310/318 M LECTURE 21...

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