04102009f (2) - into another functional group during the...

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CH 310M/318M – MWF 9:00 – Lecture 34 – W 4/15/2009 Last Time : Electrophilic addition reactions of alkynes Reading Assignment : Sections 8.6 & 8.8 (we will not cover 8.7) Textbook Problems : 7.6, 7.29-7.32, 8.1-8.3, 8.8, 8.9, 8.12, 8.13 Graded Homework : HW#16 deadline = 3:00 p.m. on Thu 4/16 HW#17 deadline = 3:00 p.m. on Mon 4/20 (last graded HW due before Midterm Exam #3) Today : Mechanism of alkyne oxymercuration (continued…) Reduction reactions of alkynes Synthesis problems in organic chemistry (end Chapter 7) Structure, nomenclature, and physical properties of alkyl halides – PLEASE READ AND UNDERSTAND SECTIONS 8.1 THROUGH 8.3!!! YOU WILL BE RESPONSIBLE FOR THIS MATERIAL!!!
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There are 3 types of operations involved in organic synthesis: Functional group transformations Most of the reactions you have learned at this stage are examples of a functional group transformation – one functional group is converted
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Unformatted text preview: into another functional group during the course of the reaction • Control of stereochemistry If a particular stereoisomer of the target is desired, use of stereoselective reactions will be necessary during the course of the synthesis. Several of the reactions you have learned thus far allow for stereochemical control (syn addition vs. anti addition) • Formation of C–C bonds Since the goal of organic synthesis (in the real world, at least) , is to build up complex target compounds from simple (and inexpensive) starting materials, reactions that form carbon–carbon bonds are typically of tremendous importance in synthesis. At this stage you only know one reaction that leads to formation of a new C–C bond – alkylation of an acetylide ion by treatment with a methyl or 1 ° alkyl halide....
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This note was uploaded on 09/10/2009 for the course CH 54455 taught by Professor Colapret during the Spring '08 term at University of Texas.

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04102009f (2) - into another functional group during the...

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