Identify the reagents necessary to accomplish each of the following transformations.

What is the major elimination product obtained from the following reaction? Br toons CH3 (CH3)3CO (CH3)3COH CH₂ Of-Bu || CH₂ Of-Bu III CH3 o IV CH3

4. Regioselectivity Draw the major product formed for each reaction. Assume the reactions are irreversible. Include stereochemistry when products contain stereocenter(s). (a) Draw only the substitution product. Both elimination and substitution occur here. Hac Br CH₂OH (c) (b) CH3 CH3 Br H NaOCH3 80 °C 1 equiv CH3Li then

Which set of reagents best accomplishes the following transformation? OH A) 1) KMNO4. OH, heat CH3CI AICI3 2) H3O B) CH;CI NBS 1) KMNO4, OH, heat AICI3 hv 2) H,0° C) Br2 Mg CO2 FeBr3 D) CH;CI CO2 NBS Mg AICI3 hy O A O B

What would be the major product(s) of the following reaction 1 equiv. HBr(conc) ? heat O CGH5CH2BR +CH3OH O CGH5CH2B + CH3BR O CGH5CH2CH2Br O CGH5Br + CH3OH O CGH5CH2OH+ CH3Br

Choose reagents from the table to accomplish transformations in the scheme below.List reagents by letter.Step1fill in the blank 1Step2fill in the blank 2Step3fill in the blank 3Step4fill in the blank 4

Which compound is the dominant product of the reaction below? CH;CH2OH H,SO4 OH OH он он O. Compound A Compound B Compound C Compound D Compound A Compound D OCompound B Compound C

What is the major product of the following nucleophilic ring-opening reaction (Hint: basic condition)? 1. Dimethyl ether CH3MgBr + H2C CHCH3 2. H2O+ ? 1. CH3CH2CHCH3 II. HOCH2CHCH3 III. HOCH2CHCH3 Он CH3 OH A | B III C None D II

Fill in the missing reagents in each of the following reductions. More than one step willbe required.

OH OH ∞∞ BF3 Et₂O This reaction takes place via a pinacol rerrangement. Please, draw curved arrows to show the movement of electrons in this SPECIFIC step of the reaction mechanism. +BF3 HO: :OH OH (BF3OH)