R Ring-closing alkene metathesis is a convenient way to prepare large macrocycles. Draw the structure of the compound that was used to construct this macrocycle in the above retrosynthesis. • You do not have to consider stereochemistry. -85 ? II...
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- A hydrocarbon of unknown structure has the formula C8H10. On catalytic hydrogenation over the Lindlar catalyst, 1 equivalent of Η2 is absorbed. On hydrogenation overa palladium catalyst, 3 equivalents of Η2 are absorbed. (a) How many degrees of unsaturation are present in the unknown structure? (b) How many triple bonds are Present? (c) How many double bonds are present? (d) How many rings are present? (e) Draw a structure that fits the data.3. Draw the expected product/products of the following elimination reaction schemes and state if they are undergoing E1/E2. ✩ Note TsCl, Et3N converts the -OH to -OTS with the same stereochemistry. a) b) Me Me OH OH Et Et H3O+ 1) TSCI, Et3N 2) NaH, DMF ? ?please draw a curved arrow mechanism for the folloeing reaction. please include all intermediate steps H -NR -BuMe₂SICI, Et3N, DMF (50% overall yield from L-aspartic acid (12)) -NH
- 29) Draw the curved arrow mechanism, key intermediate, and product with the correct Stereochemistry for the following reaction Br2, H20Draw the structures of the missing reactants, intermediates, or products, in the following mechanism. Use wedges and dashes to indicate stereochemistry when appropriate.1. Identify (draw the structure showing stereochemistry where required) the missing reactant, reagent, or major product required to complete the following transformations.
- Chemistry please answer both in detail as im confused. thank you! Write the necessary steps to perform the following transformation. (Hint: This is a two-step procedure, H₂C For the reaction in problem 5, draw a stepwise mechanism for the first reactionCurved arrows are used to illustrate the flow of electrons. Use the reaction conditions provided and follow the curved arrows to draw the structure of the missing intermediates and products in the following mechanism. Include all lone pairs and charges as appropriate. Ignore stereochemistry. Ignore inorganic byproducts. O: hv 0: N° Br: O: Draw Major Product I NBS Draw Major Intermediate3) Please draw the structures that correspond to omitted structure for each of the following synthetic sequences. HO Cro3 Cro3 (a) Product `OH Product H,0 HO PCC Cl РСС (b) Product (e) Product OH HO РСС NABHA (f) Starting Material (c) Product OH ELOH
- Q, - write a Mechanism that explains hint he stereochemisty (sed pmacal rearangemendy a) CotH6 fonn Hcl b) HeoH O wr,te he Mechanism fer OH CHBrg NAOH (Carbene)Draw the product of the reaction of 1-methylcyclopentene with H30*/H20, as well as its preceding intermediate carbocation. H30* H20 intermediate product Why is the product you have drawn the only one that is observed? a) the heat of formation of this intermediate is lower b) the activation energy needed to form this intermediate is lower. c) the heat of formation of this product is lower d) the activation energy needed to form this product is lowerDraw the major elimination and substitution products formed in this reaction. Use a dash or wedge bond to indicate the stereochemistry of substituents on asymmetric centers, where applicable. Ignore any inorganic byproducts. Br H2O heat I I Draw One of Draw One of " the Major I I Products the Major Products I Draw One of the Major I I Products