Which one of the following statements best describes the chemistry of ring A? D E он OH A Oleandrin is a toxic cardiac glycoside found in the poisonous plant, oleander (Nerium oleander L). It has a very long IUPAC name: acetic acid [(35,5R, 10S,13R,145,165,17'R)-14-hydroxy-3-[[[2R,45,55,65)-5-hydroxy-4-methoxy-6-methyl- 2-tetrahydropyranyl]oxy]-10,13-dimethyl-17-(5-oxo-2H-furan-3-y)-1,2,3,4,5,6,7,8,9,11,12,15,16,17- tetradecahydrocyclopenta[a]phenanthren-16-yl] ester O Ring-A can act as a reducing sugar O Ring-A can undergo mutarotation O Ring-A is non-reducing O Ring-A is a furanose B.

4.  identify the structure of A and B in the following synthetic scheme: Write out complete reactions for each step, showing the structure of all reactants and products.       (a) cyclohexanol +Na2Cr2O7/H2SO4, H2O -------> A        (b)  A + Et2NH/H2SO4 ----->B

(b) Consider the reaction of 1-bromobutane with a large excess of ammonia (NH3). Draw the reactants, the transition state, andthe products. Note that the initial product is the salt of an amine (RNH3+ Br - ), which is deprotonated by the excess ammonia to give the amine.

Draw the structure of the expected organic product(s) formed in the following reactions including correct stereochemistry. If the product is racemic write both isomers or write racemic. Assume all reagents listed are present in excess unless otherwise noted. If no reaction occurs, state 'No Reaction'

Under acid-catalyzed conditions, epoxides can be opened by a variety of nucleophiles other than water, such as alcohols. In such a case, the nucleophile will generally attack at the more substituted position. Using this information, predict the products for each of the following reactions (a-b): ? 1) RCO-H 2) [H₂SOJ Modify the given structure to draw the major product(s). Use the single bond tool to interconvert between double and single bonds. If a racemic mixture of enantiomers is expected, draw both enantiomers. Note: you can select a structure and use Copy and Paste to save drawing time. CH₂ Edit Drawing A

Write equations for the reaction of pent-2-ene with the following:(a) H2 and Pd catalyst (b) Br2(c) HCl(d) H2O and H2SO4 catalyst

Can someone help me with this?

(a) Give an acceptable name for each compound, (b) Draw the organic products formed when A or B is treated with each reagent: [1] H3O+; [2] −OH, H2O; [3] CH3CH2CH2MgBr (excess), then H2O; [4] LiAlH4, then H2O.

Aa.92.

Give the products for each of the following reactions. (a) (b) (c) + H₂cod OCH3 о || -COCH 3