有機化學第八ç«&

有機化學第八ç«&

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1 8. Alkynes: An Introduction to Organic Synthesis 有機合成的簡介 Based on McMurry’s Organic Chemistry , 7 th edition 工業上製備乙炔 High temperature decomposition (pyrolysis) of methane 2 以乙炔為原料 • Acetaldehyde 乙醛 • Acetic acid 醋酸 • Vinyl chloride 氯乙烯 sing ethylene as starting material 3 Using ethylene as starting material is more efficient. Why this chapter? We will use alkyne chemistry to begin looking at general strategies used in organic synthesis 4
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2 OUTLINE • Naming Alkynes 炔的命名 • Preparation of Alkynes 炔的合成 : Elimination Reactions of Dihalides 雙鹵化物的脫離反應 5 OUTLINE • Reactions of Alkynes 炔的反應 – Addition of HX and X 2 Hydration of Alkynes Reduction of Alkynes Oxidative Cleavage of Alkynes 6 OUTLINE • Alkyne Acidity: 炔的酸性 Formation of Acetylide Anions • Alkylation of Acetylide Anions 烷化 • An Introduction to Organic Synthesis 7 8.1 Naming Alkynes •W i th - yne ” as a suffix indicating an alkyne
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3 Diynes, Enynes, and Triynes A diyne has two triple bonds An enyne has a double bond and triple bond A triyne has three triple bonds 9 Naming Alkynes II Numbering of an enyne chain starts from the end nearer the first multiple bond, whether double or triple. 10
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有機化學第八ç«&

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