Question

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5. Predict the major product for the following elimination reaction. Make sure that you draw any relevant chair conformers to support your answer. Ts KOt-Bu H3C "ICH3 t-BuOH CH3 6. Draw a cycloalkyl bromide with molecular formula C7H13Br that would give exclusively the following alkene under E2 reaction conditions. Use wedges and/or hashes to show the relative stereochemical relationships between groups, and support your answer with a relevant chair structure. KOt-Bu t-BuOH

Answer 1

ANSWER Your OTS Kot Bu Vu Chot-Bu OH k ot-Bu is act as a base. It firstly capture a Proton then elimination of good hearing group -OTS takes place. so it is an example of A2 (elimination bimodecular) reaction. Lunots H ot н,- CH₂ "Сн, Сн, CH₂ Chair conformation sot to o of c-ots bond CH bond from the above chair conformation we con bee that o orbital of the marked -H bond is perfectly alligned with & of c-ots. So the marked 'H' is eliminate to give the desired product. warnets - CH CH (maior product)

ko4 -3 t-Buch The essential condition for E2 43 two leaving partner must occupy the anti peri planar conformation, CH₂ Neo-tou in anti periplanar Ho ( V ' with This is not in antiperiplonor condition. This is only product formed the above bromide, from