(a)
Interpretation: The structure of brevicomin is to be drawn.
Concept introduction: The acid-catalyzed cyclization of
(b)
Interpretation: The synthesis of
Concept introduction: The nucleophilic addition reactions are the common reactions, which form products like imines,
Want to see the full answer?
Check out a sample textbook solutionChapter 21 Solutions
KCTCS Organic Chemistry Value Edition (Looseleaf) - Text Only
- Why does the carbomethoxy group directs the reaction to positions that are meta to it ?b) Why the formation of dinitrobenzaote is substantially disfavored ?c) Would you expect small amounts of the ortho and para substituted product ? How would you remove them if they are formed ?d) Why does water have a retarding effect on the nitration ?e) Explain why Benzene has lower reactivity in electrophilic addition reactions than cyclohexene?arrow_forwardBrevicomin, the aggregation pheromone of the western pine bark beetle, contains a bicyclic bridged ring system and is prepared by the acidcatalyzed cyclization of 6,7-dihydroxy-nonan-2-one. a. Suggest a structure for brevicomin. b. Devise a synthesis of 6,7-dihydroxynonan-2-one from 6-bromohexan-2- one. You may also use three-carbon alcohols and any required organic or inorganic reagents.arrow_forwardDisparlure, 7,8-cis-epoxy-2-methyloctadecane, is an attractant for the Gypsy Moth. Disparlurecan be synthesized in high yield and stereoselectivity. The synthetic material is as active as the natural substance.a) Show how you could make (+/-)-disparlure from 6-methyl-1-bromoheptane and undecanal.arrow_forward
- a,b-Unsaturated carbonyl compounds are susceptible to either 1,2 addition or 1,4 (Michael)addition. Give examples of nucleophiles that would favor each case and explain yourreasoningarrow_forward1. i)Give the structure of the product from the reaction of propanal with 1M ethanol in dry acid . ( II)What happens when further 1M of ethanol is added to the abovearrow_forwardA- What is the definition of acidity? B- Compare the acidity of ammonia and its aliphatic derivatives with of acidity pyrrole C- Melting points of pyrrole is higher than melting point of 1-methyl pyrrole explain your answer D- Why does pyrrole prefer electrophilic substitution reactions? E- Why Pyrrole is considered to be an aromatic compound ? F- Explain the Reimer-Tiemann reaction mechanism of heterocyclic compounds? G- Why pyridine is a weak base? explain your answer? H- Pyridine can react with electrophiles, electrophilic substitution ? explain your answer ? G- Explain the Diels–Alder reaction mechanism of heterocyclic compounds? I- From a-haloketone how can you prepared flowing compounds : Imidazole Oxazole Thiazole J- compared the acidity and basicity of Pyrazole and Imidazole with Pyrrole and Pyridine ?arrow_forward
- Brevicomin, the aggregation pheromone of the western pine bark beetle, contains a bicyclic bridged ring system and is prepared by the acid-catalyzed cyclization of 6,7-dihydroxynonan- 2-one. a. Suggest a structure for brevicomin. b. Devise a synthesis of 6,7-dihydroxynonan-2-one from 6-bromohexan-2-one. You may also use three-carbon alcohols and any required organic or inorganic reagents.arrow_forwardDefine the Reaction of Organometallic Reagents with Other Compounds ?arrow_forwardFill in the missing reagents below.arrow_forward
- rank the aryl halide in order of increasing reactivity in nucleophilic aromatic substitution by an addition elimination mechanism.4-chloro 3-nitrotoluene,1 fluoro 2,4-dinitrobenzene,4-fluoro 3-nitrotoluenearrow_forwardGive the structure of the product omittedarrow_forwardGive a clear handwritten answer..complete the following reaction with missing reagentsarrow_forward
- Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage LearningOrganic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage Learning
- EBK A SMALL SCALE APPROACH TO ORGANIC LChemistryISBN:9781305446021Author:LampmanPublisher:CENGAGE LEARNING - CONSIGNMENT