(a)
Interpretation: The skeletal structure of the anabolic steroid methenolone from the given description is to be drawn.
Concept introduction: Steroids are composed of tetracyclic lipids. They have structure containing three six membered ring and one five membered ring. Some of the steroids are biologically active.
(b)
Interpretation: The skeletal structure of the anabolic steroid methenolone from the given description about the configurations at the stereogenic centers is to be drawn.
Concept introduction: Steroids are composed of tetracyclic lipids. They have structure containing three six membered ring and one five membered ring. Some of the steroids are biologically active.
The stereogenic centers with
(c)
Interpretation: The structure of Primobolan, the product formed on the treatment of methenolone with
Concept introduction: In the presence of base, the hydroxyl group loses its proton to form alkoxide. The alkoxide attacks on the carbonyl carbon of acyl chloride or acylic anhydride to leading to the formation of acyl group and removal of chloride. This process is known as acylation.
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ORGANIC CHEMISTRY
- Give typed explanationarrow_forwardHexadecyltrimethylammonium chloride, CH3(CH2)15N(CH3)+3 Cl-, is one of a class of cationic detergents, commonly used inshampoos and as “clothes rinses.”(a) Identify the hydrophilic head group and the hydrophobic tail.(b) Draw a depiction of a micelle that would form if this compound were dissolved in water.(c) What are the intermolecular forces that are primarily responsible for the micelle’s solubility in water?arrow_forwardPlease answer the question in full as they are under on questionarrow_forward
- Give detailed Solution with explanation needed (no need Handwritten answerarrow_forwardHelparrow_forward31. Which of the following statements about cholesterol is not correct? CH. HO Cholesterol 16 (a) Cholesterol is a steroid that contains a tetracyclic ring system. (b) Cholesterol is a steroid that contains 8 chiral carbons and can form 28 or 256 stereoisomers. (c) Each atom or group attached to a ring-junction carbon (i.e., carbons a-e) is in a trans or axial position. Because of this the tetracyclic ring system is mostly flat. (d) Cholesterol is used to synthesized vitamin D, bile acids, sex hormones, and adrenocorticoid hormones. (e) Cholesterol is not found in the cell membranes of animals.arrow_forward
- An amide is typically drawn with a single bond connecting the carbonyl C atom to the N atom. If this representation were accurate, we would expect the N atom to be pyramidal, and we would also expect C-N to undergo free rotation. In actuality, however, the N atom is rather planar, and the rotation is quite hindered-properties that give rise to important secondary structures of proteins, such as a helices and B sheets (Chapter 26). Explain these properties of the amide. R `NH2 An amidearrow_forwardCalculate the degree of unsaturation in each of the following formulas (a) Cholesterol, C27H46o (b) DDT, C14HgC15 (c) Prostaglandin E1, C2oH3405 (d) Caffeine, C8H10N402 (e) Cortisone, C21H28O5 (f) Atropine, C17H23NO3arrow_forwardCoibacin B (shown below) is a natural product that exhibits potent anti-inflammatory activity and potential activity in the treatment of leishmaniasis, a disease caused by certain parasites (Org. Lett. 2012, 14, 3878-3881): (a) Assign the configuration (R or S) of each chirality center (labeled A to C) in coibacin B. (b) Identify the number of possible stereoisomers for this compound, assuming that the geometry of the alkenes are fixed. Choices are given below and write the CAPITAL LETTER of your choice. A. 2 В. 4 С. 8 D. 16 ANSWERS: (a) A. В. C. (b)arrow_forward
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