Concept explainers
a)
Interpretation:
At what positions the terpenoid guaiol will be labeled if isopentyl diphosphate and dimethylallyl diphosphate from which they are synthesized are isotopically labeled at the diphosphate bearing carbon atom (C1).
Concept introduction:
In the formation of terpenes every fourth carbon of one dimethylallyl phosphate (formed by the isomerization of isopentyl diphosphate) combines with the first carbon of the isopentyl phosphate molecule. Hence if the diphosphate bearing carbon is labeled, every fourth carbon in a terpene will be a labeled carbon.
To give:
The positions at which the terpenoid guaiol will be labeled if isopentyl diphosphate and dimethylallyl diphosphate from which it is synthesized are isotopically labeled at the diphosphate bearing carbon atom (C1).
b)
Interpretation:
At what positions the terpenoid sabinene will be labeled if isopentyl diphosphate and dimethylallyl diphosphate from which they are synthesized are isotopically labeled at the diphosphate bearing carbon atom (C1).
Concept introduction:
In the formation of terpenes every fourth carbon of one dimethylallyl phosphate (formed by the isomerization of isopentyl diphosphate) combines with the first carbon of the isopentyl phosphate molecule. Hence if the diphosphate bearing carbon is labeled, every fourth carbon in a terpene will be a labeled carbon.
To give:
The positions at which the terpenoid sabinene will be labeled if isopentyl diphosphate and dimethylallyl diphosphate from which it is synthesized are isotopically labeled at the diphosphate bearing carbon atom (C1).
Want to see the full answer?
Check out a sample textbook solutionChapter 27 Solutions
Organic Chemistry
- 13-29 Show that if you add Steps 2a and 2b of the radical- chain mechanism for the autoxidation of a fatty acid hydrocarbon chain, you arrive at the following net equation: H I —CH2CH=CH—CH— + 0—0 • » Section of a fatty acid Oxygen hydrocarbon chain O—O—H I —CH2CH=CH—CH— A hydroperoxidearrow_forward17-74 Glucose, C6H12O6, contains an aldehyde group but exists predominantly in the form of the cyclic hemiacetal shown here. We will discuss this cyclic form of glucose in Chapter 20. A cyclic hemiacetal is formed when the —OH group of one carbon bonds to the carbonyl group of another carbon. (a) Which carbon in glucose provides the —OH group and which provides the —CHO group? (b) Draw the alternative chair confirmations of D-glucose and state which of the two is the more stable.arrow_forward17-14 Following are structural formulas for two steroid hormones. (a) Name the functional groups in each. (b) Mark all stereocenters in each hormone and state how many stereoisomers are possible for each.arrow_forward
- 1 Write an equation for the hydrolysis of trimethyl phosphate to dimethyl phosphate and methanol in aqueous base. Show each product as it would be ionized in this solution.arrow_forwardNaturally occurring compounds called terpenoids, which we'll discuss in Section 27-5, are biosynthesized by a pathway that involves loss of CO2 from 3-phosphomevalonate 5-diphosphate to yield isopentenyl diphosphate. Use curved arrows to show the mechanism of this reaction.arrow_forward15-9 What does the term “achiral” mean? Give an example of an achiral molecule.arrow_forward
- 29) which exhibit hidrogen bonding CH2O NH3 CH3OH C2H6arrow_forwardGive the functions of the following ingredients, then name a branded/commercial skin or hair care product where the said material is used. Tetrasodium EDTA Cholesterol Silicone Oil 200/50 cst BETAINE Carbopol Ultrez D & C Red No. 17 ( CI No. 26100) Bisabolol (Alpha Bisabolol) Ceresin Wax Disodium Lauryl Sulfosuccinate Hydroxypropyl Methylcellulosearrow_forwardwhat is the product of a reaction between C10H16(terpinene) +maleic anhydridearrow_forward
- Asetaldehitin aşağıdakiler ile olan reaksiyonunu yazınız.(a) Tollens’ ayracı (b) 2,4-dinitrofenilhidrazin (c) I2 / NaOHarrow_forwardCan 4-methylcyclohexanoic acid be reduced by NABH4?arrow_forwardFrom Table 1.1 indicates, among other things, the melting points of various fatty acids. Analyze the trend that the melting points of saturated fatty acids follow, from n-dodecanoic (CH3-(CH2) 10-COOH) to n-tetracosanoic (CH3-(CH2)22-COOH), and answer both next questions. Briefly justify your answers. i) What value would you expect the melting point of triacontanoic acid (CH3-(CH2) 28-COOH) to have? Choose one of the following options:a) More than 200 ° Cb) About 94 ° Cc) Less than 86 ° Cd) Exactly 86.1 ° C ii) What value would you expect the melting point of octanoic acid (CH3-(CH2) 6-COOH) to have? Choose one of the following options:a) 43.5 ° Cb) -20 ° Cc) About 20 ° Carrow_forward
- Introduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage Learning