Write structures for the carbonyl electrophile and enolate nucleophile that react to give the aldol below. OH O He H • You do not have to consider stereochemistry. Draw the enolate nucleophile in its carbanion form. Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner. Separate multiple reactants using the + sign from the drop-down menu. ●

Write structures for the carbonyl electrophile and enolate nucleophile that react to give the aldol below. OH O He H • You do not have to consider stereochemistry. Draw the enolate nucleophile in its carbanion form. Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner. Separate multiple reactants using the + sign from the drop-down menu. ●

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter14: Elimination

Section: Chapter Questions

Problem 35CTQ

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This reaction is an example of conjugate addition of a nucleophile to an a,ẞ-unsaturated carbonyl. O CH3CH2CH2CH=CHCSCOA H₂O OH CH3CH2CH2CHCH2CSCOA Draw the two resonance structures of the enolate anion intermediate for this reaction. • Draw an R1 group in place of COA. The R group tool is located in the charges and lone pairs drop-down menu. • Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner. • Separate resonance structures using the symbol from the drop-down menu. ->> 90-87 O + ? ChemDoodle >
Write structures for the carbonyl electrophile and enolate nucleophile that react to give the aldol below. ОН You do not have to consider stereochemistry. • Draw the enolate nucleophile in its carbanion form. • Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner. • Separate multiple reactants using the + sign from the drop-down menu.
2. Draw a mechanism for the reaction of the nucleophile and the electrophile as indicated below. Also draw the product produced. CH3 H3C+CI CH3 + HO
7. Circle the best substrate for a nucleophilic substitution reaction. OH OCH3 SH CI
29) Draw all of the expected products for the following reaction. Circle the most dominant product in each reaction. 'BUOK 3 NaOEt
Revlew Teples Referencen) Draw structures for the carbonyl electrophile and enolate nucleophile that react to give the aldol or enone below. You do not have to consider stereochemistry. • Draw the enolate ion in its carbanion form. • Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner. • Separate multiple reactants using the + sign from the drop-down menu. ノク Imail hatucP Save and C
This reaction is an example of conjugate addition of a nucleophile to an a,ẞ-unsaturated carbonyl. H3C LOCH3 H₂O H3C OCH3 OCH3 Draw the two resonance structures of the enolate anion intermediate for this reaction. • Draw an R1 group in place of CoA. The R group tool is located in the charges and lone pairs drop-down menu. • Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner. Separate resonance structures using the symbol from the drop-down menu. • O H CH3 ? [F
resource from Cengage Learning - Google Chrome ssignment/takeCovalentActivity.do?locator=assignment-take e by the Aldol Condensation (References) OH base + H,0 heat H. H3C H. The aldol reaction is a carbonyl condensation reaction between two carbonyl partners and involves a combination of nucleophilic addition and a-substitution steps. One partner is converted into an enolate ion nucleophile and adds to the electrophilic carbonyl group of the second partner. In the classic aldol reaction, the carbonyl partners are aldehydes or ketones, although aldehydes are more reactive. The product is a B-hydroxy carbonyl compound. In the mixed aldol reaction, the best results are obtained when one of the partners does not have an a-hydrogen. It cannot form an enolate anion and can therefore not undergo self-reaction. The enolizable aldehyde is added slowly to a basic solution of the first aldehyde so that the mixed product is preferentially formed. Under reaction conditions slightly more vigorous…
Draw the mechanism for the reaction below. OH HN. HCI H2O, heat OH NH₂ дон. OH
4) When a mixture of two different compounds both containing a hydrogens are placed under acidic or basic conditions, crossed aldol products can be formed. By either self-condensation or cross condensations. Draw the 4 aldol and 4 a.B-unsaturated ketones that can be made from the following mixed system. -OH 4 products One way to control this is by either having only one compound with a hydrogens or by reacting the desired nucleophile with lithium diisopropylamide (LDA) before addition of second carbonyl. The issue here is that this reaction stops at the aldol unless excess base is used. он LDA OH heat Show a synthetic scheme of how to use the following carbonyls to control the formation of each cross product (i.e. each as nucleophile and electrophile, two reactions). and
Write structures for the carbonyl electrophile and enolate nucleophile that react to give the aldol below. он You do not have to consider stereochemistry. Draw the enolate nucleophile in its carbanion form. Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corne • Separate multiple reactants using the + sign from the drop-down menu.
1. Choose the correct major organic product for the following Aldol/ Claisen reaction Select] 2. Assign the reaction [Select] To preview image Click Here & 구요 A B C D A OMO OMO 1. NaOMe/MeOH 2. H₂O* میں پہلی پہلے مجھے LAISEN veici