MECHANISM PROBLEMS 14-20 Predict the major product(s) from the addition of 1 equivalent of HX Jand...
completely lost on the diels-alder reactions! I need
help please.
CH2 14-21 We've seen that the Diels-Alder cycloaddition reaction is a one-step, pericyclic process that occurs through a cyclic transition state. Propose a mechanism for the following reaction: Heat + H2C=CH2
4. Disnes undergo 1.2-addition OR 1,4-addition with FIX and X: The major product is determined by the temperature of the reaction notice how alkene shifted OR AB 1,2-addition 1.4.ddition when heated A) Drew mechanisms to account for all possible products (hox all final products). Explain which products will be favored at low temperatures, which at high temperatures H-C B) Draw the major product of the following reactions. 1 Bry -78 °C HCI 40 °C 65 5. Only s-cis dienes can...
Prefict major products. Draw reaction mechanism. show all
work.
Predict the major product (s) for the following Diels-Alder reaction. Draw the reaction mechanism. о ОН д + ОН о
(a) Pericyclic Reactions Predict the major product of each of the following Diels-Alder cycloadditions. Your answer should include an explanation of the regio- and stereoselective outcome of each reaction. NHCH Ph (b) Use the frontier molecular orbital approach to predict the stereochemical outcome of the following 4x electrocyclic, ring-closing reactions. (c) Give a mechanism for each step in the following reaction, showing the key conformer which accounts for the observed stereochemistry of the product. 1. Me (OE) Qara Qar (d)...
Propose a mechanism and major product for #1
Predict the major product from the reaction below. Draw a reasonable mechanism for each transformation below.
1. Predict the major product for the following electrophilic addition reactions. Show the mechanism for each reaction. a. catalytic H2SO4 OH b catalytic H2SO4 H2O catalytic H2SO4 но
1. (8 marks) Predict the MAJOR product from the following reaction and draw a clear step- by-step mechanism for the reaction. Also, briefly explain why this is the major product that is formed. NH: Poso,oro NH OSO2CF3
what is the major product. show step-by-step mechanism?
20) Which of the following alkenes yield(s) 3-bromo-3-methylpentane as the major product upon addition of HBr? (2 points) A) I and II only B) 111 only C) I, II, and III only D) all of them E) none of them 21) Give the major organie product for the reaction. (3 points) CH.CH CHCCH excesS HBr
Chem 2200 E1/E2 Practice Problems tn 1. Predict the major produc t in each of the following reactions Ha OEt b) Br Ph 2. When 1-chloro-oox(Compound I) is treated with sodium methoxide in methanol, elimination readily occurs to give 1,2-x0oxd compound I). However, the two diastereomers of i (la and lb) each give one single isomer of il (either lla or lib) as shown below. Provide structures for la and ib as well as a mechanistic explanation for the stereopecificity....