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Unformatted text preview: CHEMISTRY 2212 EXAM II February 21, 2007 Be sure to read each question carefully. Partial credit will be assigned where appropriate. To receive full credit you must answer the question completely. Relax and good luck!! 1. (16 total points) Design a synthesis of Stilbene from Dibenzyl Ether using reagents found in the reagent box. Dibenzyl Ether is the only source of carbons. You may only use reagents found in the box, but you may use them in any order necessary to accomplish the transformation. Full credit will only be awarded for an efficient synthesis using fewer than 6 steps (with work-up). Write the reaction, step-by-step, showing intermediates and the corresponding reagent listed above the arrow. Summarize the reagents used (in order, by their number) in the boxes provided. j=\ CH, -0 j=\ j=\ \__rCH=CH "\J stilbene Lj';'CH2 ~" dibenzyl ether (Ph)3P + PhBr 1 6 FCC , CH2Cl2 SCORE 2 HBr (concentrated, not aqueous) 7 H+, heat....
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This note was uploaded on 04/02/2008 for the course CHEM 2212 taught by Professor Habbard during the Spring '08 term at University of Georgia Athens.
- Spring '08