University:
Emporia State University
Course:
CH 126 | Chemistry Ii
Academic year:

2020
Views:

87

Pages:

7
Author:

levedzgetmo7f

Draw the structure of the organobromide that can be used to prepare the following Gilman reagent. CuLi You do not have to consider stereochemistry You do not have to explicitly draw H atoms. ChamDate Correct Organohalides are treated with lithium metal to yield an organolithium, which is in turn treated with copper(1) iodide to yield the corresponding Gilman reagent. RX RLI Cul R₂Culi Organohalides are treated with lithium metal to yield an organolithium, which is in turn treated with copper(1) iodide to yield the corresponding Gilman reagent. RX RLI Cul R-Culi Decide what lithium diorganocopper (Gilman) reagent is needed to prepare 1-butylcyclohexene from I-iodocyclohexene If a structure has a copper-lithium bond, draw the lithium ion in a separate sketcher. Separate structures with signs from the dropdown menu. ChemDoode Chamboodle Correct Note that the instructions say to draw the Li ion in a separate sketcher. Your answer should be as follows: Shown below is one step in the synthesis of racemie trans-2-(1-propenyl cyclohexanol from cyclohexane. From the list of reagents provided, choose the reagent(s) that will bring about this transformation. Br Reagents available a. B*x_{2} light (C*H_{3}) 3 CO^ - K^ + b. HBr LRCO₂H H_{2}*S*O_{4}, H_{2}*O C*H_{3}*OH 4.1. H 2 C=CH - C * H_{2} MgBr h. 1. C*H_{2}*CH = CH*M_{Z}*Br 2. 2. (No more than one step is necessary. Write the letter of the reagent(s) in the box provided, egg) Your answer: This step involves free-radical bromination CH-CH CHBry (CHCOK Draw the major organic product of the reaction shown above. Use the wedge hash bond tools to indicate stereochemistry. Include H atoms at chiral centers only. Show stercochemistry in a meso compound. If the reaction produces a racemic mixture, just draw one stereoisomer ChanDoode Br Br H CHBr (CH),COK Organolithium compounds react with carbonyl compounds in a way that is similar to that of Grignard reactions. Draw the structure of the expected product when the compound below reacts with methyllithium followed by aqucous acid werkup You do not have to consider stereochemistry You do not have to explicitly draw Hatoms. Draw organic species only. Correct Organolithium reagents, like Grignard reagents, behave as strong nucleophiles and add to carbonyl compounds, such as aldehydes and ketones, to form secondary and tertiary From the choices provided, choose the reagent(s) that you would use for the following transformation. OH Reagents available a. Bry, light 1. RCO,H b. Mg. ether 2. oxirane HO h. CH, CHO 4. CH₂CH₂Br 1.2 1 (CH), CHCH, CH, Br J Cul (List your answer as a single letter (single-step transformation) or a series of letters (multi-step transformation) with no commas separating them, eg, abed. NOTE: The order in which you list your letters matters.) Your answer: abge