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Lecture 23-Rxns of alkynes

Lecture 23-Rxns of alkynes - CH310/318MSp.2011 Lecture23...

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Lecture 23 Reactions of Alkynes:  Hydrations Reductions Retrosynthesis : : : Announcements : : : Exam 3 is Next Tuesday evening!! 7:00 – 9:00pm WEL 1.316 Will cover up to end of Ch. 7 Review Session: Sat. 10:30am – noon WEL 1.308 Blackboard grade updates CH 310/318M – Sp.2011
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Last Time Alkyne Nomenclature , Structure & Preparation Electrophilic Additions (HX and X2) – product depends on reagent  stoichiometry V. Patman 2 CH 310/318M – Sp.2011 Thurs 4.14.11
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Hydration - Hydroboration A problem. . . . Use a new borane reagent: Thurs 4.14.11 V. Patman 3 CH 310/318M – Sp.2011 B-H Di- sec -isoamylborane            [(sia) 2 BH]
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Hydroboration For internal alkynes: Terminal alkynes require use of bulky borane Thurs 4.14.11 V. Patman 4 CH 310/318M – Sp.2011 CH 3 1) BH 3 2) H 2 O 2 , NaOH (aq) CH 3 O CH 3 O 1) (sia) 2 BH 2) H 2 O 2 , NaOH (aq) H O
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Hydroboration Mechanism Thurs 4.14.11 V. Patman 5 CH 310/318M – Sp.2011 1) (sia) 2 BH 2) H 2 O 2 , NaOH (aq) H O
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